diff --git a/src/components/Configure/content/fields/OptionalFields/OptionalFieldsV2.tsx b/src/components/Configure/content/fields/OptionalFields/OptionalFieldsV2.tsx
index 99f976e2..ff61c380 100644
--- a/src/components/Configure/content/fields/OptionalFields/OptionalFieldsV2.tsx
+++ b/src/components/Configure/content/fields/OptionalFields/OptionalFieldsV2.tsx
@@ -1,6 +1,9 @@
 import { useMemo } from "react";
 import { HydratedIntegrationFieldExistent } from "services/api";
-import { isIntegrationFieldMapping } from "src/utils/manifest";
+import {
+  getFieldDisplayName,
+  isIntegrationFieldMapping,
+} from "src/utils/manifest";
 
 import {
   CheckboxItem,
@@ -36,7 +39,7 @@ export function OptionalFieldsV2() {
         )
         .map((field) => ({
           id: field.fieldName,
-          label: field.displayName,
+          label: getFieldDisplayName(field),
           isChecked: !!selectedOptionalFields?.[field.fieldName],
         }))
         .sort((a, b) => a.label.localeCompare(b.label)) || [],
diff --git a/src/components/Configure/content/fields/RequiredFields.tsx b/src/components/Configure/content/fields/RequiredFields.tsx
index 03cae04d..ed81b78d 100644
--- a/src/components/Configure/content/fields/RequiredFields.tsx
+++ b/src/components/Configure/content/fields/RequiredFields.tsx
@@ -1,6 +1,9 @@
 import { useManifest } from "src/headless";
 import { useProjectQuery } from "src/hooks/query";
-import { isIntegrationFieldMapping } from "src/utils/manifest";
+import {
+  getFieldDisplayName,
+  isIntegrationFieldMapping,
+} from "src/utils/manifest";
 
 import { Tag } from "components/ui-base/Tag";
 
@@ -39,7 +42,9 @@ export function RequiredFields() {
         {requiredFields?.length
           ? requiredFields.map((field) => {
               if (isIntegrationFieldMapping(field)) return null;
-              return <Tag key={field.fieldName}>{field.displayName}</Tag>;
+              return (
+                <Tag key={field.fieldName}>{getFieldDisplayName(field)}</Tag>
+              );
             })
           : "There are no required fields."}
       </div>
diff --git a/src/components/InstallWizard/steps/ReviewStep.tsx b/src/components/InstallWizard/steps/ReviewStep.tsx
index a4e72f71..f113ed49 100644
--- a/src/components/InstallWizard/steps/ReviewStep.tsx
+++ b/src/components/InstallWizard/steps/ReviewStep.tsx
@@ -9,6 +9,7 @@ import {
   useManifest,
 } from "src/headless";
 import { handleServerError } from "src/utils/handleServerError";
+import { getFieldDisplayName } from "src/utils/manifest";
 
 import { StepHeader } from "../components/StepHeader";
 import { useWizard } from "../wizard/WizardContext";
@@ -34,7 +35,7 @@ export function ReviewStep() {
         manifestObj?.getRequiredFields("no-mappings") ?? []
       )
         .filter((f) => "fieldName" in f)
-        .map((f) => ("fieldName" in f ? f.displayName || f.fieldName : ""));
+        .map(getFieldDisplayName);
 
       // Selected optional fields
       const selectedOptionalFields = (
@@ -44,7 +45,7 @@ export function ReviewStep() {
           const fieldName = "fieldName" in f ? f.fieldName : "";
           return fieldName && configObj?.getSelectedField(fieldName);
         })
-        .map((f) => ("fieldName" in f ? f.displayName || f.fieldName : ""));
+        .map(getFieldDisplayName);
 
       // Configured field mappings (source → destination)
       const allMapFields = [
diff --git a/src/components/InstallWizard/steps/configure-objects/ConfigureObjectsStep.tsx b/src/components/InstallWizard/steps/configure-objects/ConfigureObjectsStep.tsx
index 03863dac..77174cba 100644
--- a/src/components/InstallWizard/steps/configure-objects/ConfigureObjectsStep.tsx
+++ b/src/components/InstallWizard/steps/configure-objects/ConfigureObjectsStep.tsx
@@ -3,6 +3,7 @@ import { useInstallIntegrationProps } from "context/InstallIIntegrationContextPr
 import { useLocalConfig, useManifest } from "src/headless";
 import { useProjectQuery } from "src/hooks/query/useProjectQuery";
 import { useProvider } from "src/hooks/useProvider";
+import { getFieldDisplayName } from "src/utils/manifest";
 
 import type { CheckboxItem } from "components/ui-base/Checkbox/CheckboxPagination";
 
@@ -13,7 +14,7 @@ import { AdditionalFieldsContent } from "./additional/AdditionalFieldsContent";
 import { FieldsContent } from "./fields/FieldsContent";
 import { MappingsContent } from "./mappings/MappingsContent";
 import { ObjectTabs } from "./ObjectTabs";
-import { getFieldDisplayName, getFieldName } from "./subPageUtils";
+import { getFieldName } from "./subPageUtils";
 import { useSubPageNavigation } from "./useSubPageNavigation";
 
 import styles from "./configureObjectsStep.module.css";
diff --git a/src/components/InstallWizard/steps/configure-objects/fields/FieldsContent.tsx b/src/components/InstallWizard/steps/configure-objects/fields/FieldsContent.tsx
index 88f2250d..ae071a65 100644
--- a/src/components/InstallWizard/steps/configure-objects/fields/FieldsContent.tsx
+++ b/src/components/InstallWizard/steps/configure-objects/fields/FieldsContent.tsx
@@ -1,8 +1,9 @@
 import type { HydratedIntegrationField } from "@generated/api/src";
 import { ArrowRightIcon, WidthIcon } from "@radix-ui/react-icons";
+import { getFieldDisplayName } from "src/utils/manifest";
 
 import { SectionHeader } from "../../../components/SectionHeader";
-import { getFieldDisplayName, getFieldName } from "../subPageUtils";
+import { getFieldName } from "../subPageUtils";
 
 import sharedStyles from "../configureObjectsStep.module.css";
 import styles from "./fieldsContent.module.css";
diff --git a/src/components/InstallWizard/steps/configure-objects/subPageUtils.ts b/src/components/InstallWizard/steps/configure-objects/subPageUtils.ts
index cd3e19d0..b2c768e7 100644
--- a/src/components/InstallWizard/steps/configure-objects/subPageUtils.ts
+++ b/src/components/InstallWizard/steps/configure-objects/subPageUtils.ts
@@ -14,11 +14,6 @@ export function getFieldName(field: HydratedIntegrationField): string {
   return isExistentField(field) ? field.fieldName : "";
 }
 
-export function getFieldDisplayName(field: HydratedIntegrationField): string {
-  if (isExistentField(field)) return field.displayName || field.fieldName;
-  return "";
-}
-
 /**
  * Determine the initial sub-page for an object based on what data it has.
  */
diff --git a/src/utils/manifest.test.ts b/src/utils/manifest.test.ts
new file mode 100644
index 00000000..d56750fc
--- /dev/null
+++ b/src/utils/manifest.test.ts
@@ -0,0 +1,104 @@
+import type {
+  HydratedIntegrationFieldExistent,
+  IntegrationFieldMapping,
+} from "@generated/api/src";
+import { describe, expect, it } from "@jest/globals";
+
+import { getFieldDisplayName, isIntegrationFieldMapping } from "./manifest";
+
+describe("isIntegrationFieldMapping", () => {
+  it("treats a field without fieldName as a mapping", () => {
+    expect(isIntegrationFieldMapping({ mapToName: "priority" })).toBe(true);
+  });
+
+  it("treats a field with fieldName as an existent field", () => {
+    expect(
+      isIntegrationFieldMapping({ fieldName: "email", displayName: "Email" }),
+    ).toBe(false);
+  });
+});
+
+describe("getFieldDisplayName", () => {
+  describe("existent fields", () => {
+    it("uses the provider displayName when the builder defined no mapping", () => {
+      const field: HydratedIntegrationFieldExistent = {
+        fieldName: "email",
+        displayName: "Email",
+      };
+
+      expect(getFieldDisplayName(field)).toBe("Email");
+    });
+
+    it("falls back to fieldName when there is no displayName", () => {
+      const field = {
+        fieldName: "estimate_number",
+        displayName: "",
+      } as HydratedIntegrationFieldExistent;
+
+      expect(getFieldDisplayName(field)).toBe("estimate_number");
+    });
+
+    // The reported bug. A nested field has no provider metadata, so the server
+    // hydrates displayName as TitleCase(fieldName) and the raw path renders.
+    it("prefers mapToDisplayName over a JSONPath displayName", () => {
+      const field: HydratedIntegrationFieldExistent = {
+        fieldName: "$['Customer']['Email']",
+        displayName: "$['Customer']['Email']",
+        mapToName: "customer_email",
+        mapToDisplayName: "Customer Email",
+      };
+
+      expect(getFieldDisplayName(field)).toBe("Customer Email");
+    });
+
+    // displayName outranks mapToName, and the server always populates it, so a
+    // nested field needs mapToDisplayName to render a readable label.
+    it("falls back to displayName when mapToDisplayName is absent", () => {
+      const field: HydratedIntegrationFieldExistent = {
+        fieldName: "$['Customer']['First_name']",
+        displayName: "$['Customer']['First_name']",
+        mapToName: "customer_first_name",
+      };
+
+      expect(getFieldDisplayName(field)).toBe("$['Customer']['First_name']");
+    });
+
+    it("prefers mapToDisplayName over a usable provider displayName", () => {
+      const field: HydratedIntegrationFieldExistent = {
+        fieldName: "firstname",
+        displayName: "First Name",
+        mapToName: "customer_first_name",
+        mapToDisplayName: "Customer First Name",
+      };
+
+      expect(getFieldDisplayName(field)).toBe("Customer First Name");
+    });
+
+    it("prefers the provider displayName over mapToName", () => {
+      const field: HydratedIntegrationFieldExistent = {
+        fieldName: "phone",
+        displayName: "Business Phone",
+        mapToName: "customer_phone",
+      };
+
+      expect(getFieldDisplayName(field)).toBe("Business Phone");
+    });
+  });
+
+  describe("field mappings", () => {
+    it("uses mapToDisplayName when present", () => {
+      const field: IntegrationFieldMapping = {
+        mapToName: "priority",
+        mapToDisplayName: "Priority",
+      };
+
+      expect(getFieldDisplayName(field)).toBe("Priority");
+    });
+
+    it("falls back to mapToName", () => {
+      const field: IntegrationFieldMapping = { mapToName: "priority" };
+
+      expect(getFieldDisplayName(field)).toBe("priority");
+    });
+  });
+});
diff --git a/src/utils/manifest.ts b/src/utils/manifest.ts
index 5409baed..330e4b8a 100644
--- a/src/utils/manifest.ts
+++ b/src/utils/manifest.ts
@@ -15,6 +15,36 @@ export function isIntegrationFieldMapping(
   return !(field as HydratedIntegrationFieldExistent).fieldName;
 }
 
+/**
+ * Returns the label to show for a field in the read UI.
+ *
+ * Precedence: mapToDisplayName > displayName > mapToName > fieldName.
+ *
+ * mapToDisplayName wins so a builder can give a nested field a readable label.
+ * The provider has no metadata for a nested path, so the server falls back to
+ * TitleCase(fieldName) and the raw JSONPath would otherwise show, e.g.
+ * "$['Customer']['Email']".
+ *
+ * displayName sits above mapToName so a provider's own label is preferred over a
+ * builder's machine name. Note the server always populates displayName, so
+ * mapToName is only reached for an IntegrationFieldMapping, which has none.
+ *
+ * @param field HydratedIntegrationField
+ * @returns string
+ */
+export function getFieldDisplayName(field: HydratedIntegrationField): string {
+  // displayName and fieldName only exist on HydratedIntegrationFieldExistent.
+  // On an IntegrationFieldMapping they are undefined and get skipped.
+  const existent = field as HydratedIntegrationFieldExistent;
+
+  return (
+    field.mapToDisplayName ||
+    existent.displayName ||
+    field.mapToName ||
+    existent.fieldName
+  );
+}
+
 /**
  * Returns the required existent fields from an object (mappings excluded).
  * For required mapping fields use getRequiredMapFieldsFromObject.