I don't have a very in-depth knowledge of Android App Bundles, but my impression was that the developer is that the developer uploads the AAB and Google generat

I don't have a very in-depth knowledge of Android App Bundles, but my impression was that the developer is that the developer uploads the AAB and Google generates an APK from it and delivers that to the user. From what I recall, there was never an announcement that sideloading APKs was going away.