diff --git a/.changeset/metal-garlics-fetch.md b/.changeset/metal-garlics-fetch.md
index 1cc4fd0353..076b5f34a5 100644
--- a/.changeset/metal-garlics-fetch.md
+++ b/.changeset/metal-garlics-fetch.md
@@ -3,4 +3,4 @@
 '@backstage/frontend-app-api': patch
 ---
 
-Move implementations for some APIs to `ApiExtensions` instead that are discovered from the tree
+Moved several implementations of built-in APIs from being hardcoded in the app to instead be provided as API extensions. This moves all API-related inputs from the `app` extension to the respective API extensions. For example, extensions created with `ThemeBlueprint` are now attached to the `themes` input of `api:app-theme` rather than the `app` extension.
diff --git a/packages/frontend-app-api/src/extensions/AppThemeApi.tsx b/packages/frontend-app-api/src/extensions/AppThemeApi.tsx
index 375b9e666b..d0dcad34e8 100644
--- a/packages/frontend-app-api/src/extensions/AppThemeApi.tsx
+++ b/packages/frontend-app-api/src/extensions/AppThemeApi.tsx
@@ -32,8 +32,6 @@ import { AppThemeSelector } from '@backstage/core-app-api';
 
 /**
  * Contains the themes installed into the app.
- *
- * @public
  */
 export const AppThemeApi = ApiBlueprint.makeWithOverrides({
   name: 'app-theme',
diff --git a/packages/frontend-app-api/src/extensions/ComponentsApi.tsx b/packages/frontend-app-api/src/extensions/ComponentsApi.tsx
index 2949e686f8..5803aacf95 100644
--- a/packages/frontend-app-api/src/extensions/ComponentsApi.tsx
+++ b/packages/frontend-app-api/src/extensions/ComponentsApi.tsx
@@ -25,8 +25,6 @@ import { DefaultComponentsApi } from '../apis/implementations/ComponentsApi';
 
 /**
  * Contains the shareable components installed into the app.
- *
- * @public
  */
 export const ComponentsApi = ApiBlueprint.makeWithOverrides({
   name: 'components',
diff --git a/packages/frontend-app-api/src/extensions/FeatureFlagsApi.ts b/packages/frontend-app-api/src/extensions/FeatureFlagsApi.ts
index 3acc6e52be..8016521539 100644
--- a/packages/frontend-app-api/src/extensions/FeatureFlagsApi.ts
+++ b/packages/frontend-app-api/src/extensions/FeatureFlagsApi.ts
@@ -24,8 +24,6 @@ import { LocalStorageFeatureFlags } from '../../../core-app-api/src/apis/impleme
 
 /**
  * Contains the shareable icons installed into the app.
- *
- * @public
  */
 export const FeatureFlagsApi = ApiBlueprint.make({
   name: 'feature-flags',
diff --git a/packages/frontend-app-api/src/extensions/IconsApi.ts b/packages/frontend-app-api/src/extensions/IconsApi.ts
index f7cb25de96..7a0ecebb40 100644
--- a/packages/frontend-app-api/src/extensions/IconsApi.ts
+++ b/packages/frontend-app-api/src/extensions/IconsApi.ts
@@ -26,8 +26,6 @@ import { DefaultIconsApi } from '../apis/implementations/IconsApi';
 
 /**
  * Contains the shareable icons installed into the app.
- *
- * @public
  */
 export const IconsApi = ApiBlueprint.makeWithOverrides({
   name: 'icons',
diff --git a/packages/frontend-app-api/src/extensions/TranslationsApi.tsx b/packages/frontend-app-api/src/extensions/TranslationsApi.tsx
index 16defdde10..9c13c3b063 100644
--- a/packages/frontend-app-api/src/extensions/TranslationsApi.tsx
+++ b/packages/frontend-app-api/src/extensions/TranslationsApi.tsx
@@ -29,8 +29,6 @@ import { I18nextTranslationApi } from '../../../core-app-api/src/apis/implementa
 
 /**
  * Contains translations that are installed in the app.
- *
- * @public
  */
 export const TranslationsApi = ApiBlueprint.makeWithOverrides({
   name: 'translations',