Submit a new version to the Play Store
Go to Google Play Developer Console.
Select your app and in the Release Management menu, click on Application Releases.
Click on Create a release, upload your AAB file, write a text in Release News and click on Verify.
Google Play Console can show warnings during this step without blocking the release. If the console still lets you save the release and continue to review, these messages are usually recommendations rather than errors. See Export an APK / AAB file for common warning examples.