Add matrix with prebuilds for RN core deps enabled

Author: kraenhansen

.github/workflows/check.yml

@@ -76,8 +76,13 @@ jobs:
       - run: npm test
   test-ios:
     if: github.ref == 'refs/heads/main' || contains(github.event.pull_request.labels.*.name, 'Apple 🍎')
-    name: Test app (iOS)
+    name: Test app (iOS${{ matrix.rncore-prebuilds && ' with RN prebuilds' || '' }})
     runs-on: macos-latest
+    strategy:
+      matrix:
+        rncore-prebuilds:
+          - true
+          - false
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
@@ -100,6 +105,11 @@ jobs:
           FERRIC_TARGETS: aarch64-apple-ios-sim
       - run: npm run pod-install
         working-directory: apps/test-app
+        env:
+          # Optionally enable experimental prebuilds
+          # https://reactnative.dev/blog/2025/08/12/react-native-0.81#experimental-precompiled-ios-builds
+          RCT_USE_RN_DEP: ${{ matrix.rncore-prebuilds && '1' || '0' }}
+          RCT_USE_PREBUILT_RNCORE: ${{ matrix.rncore-prebuilds && '1' || '0' }}
       - name: Run tests (iOS)
         run: npm run test:ios:allTests
         # TODO: Enable release mode when it works