The "Resource ID" fields are meant for native Android Apps only. Flutter doesn't have this option since flutter apps are built with widgets, not native controls. The robot simply wouldn't find them inside your app. You can use Firebase Test Labs to run your flutter integration tests though.

More info at:
https://support.google.com/googleplay/android-developer/answer/9842757?visit_id=638956339910319546-2653939833&rd=1#signin

Firebase Test Labs:
https://firebase.google.com/docs/test-lab/flutter/integration-testing-with-flutter