After having complied with the new method to submit to GooglePlay using the APP Bundle vs the APK with newly created Key which now uses RSA encryption do I need to resubmit all my existing Apps or only when I need to update an app just continue with the App Bundle method?
1. If you are updating old application, just make sure you use the app bundle (aab) with the old keystore.
2. Your New apps will use the RSA key. You can set the new RSA keystore file as default in the IDE and the old apps using the old keystore, include the signing directive