Thanks for posting! Application bundles (.aab) or binary blobs (.obb) are not supported on Appstore. You'd need to package all of your resources into a single APK file and submit as one APK file.
Multi-binary is supported though, so for example if your app targets tablets and TV devices and you want to have separate APK files for separate device families, you can do that, but you'd need to submit 2 APK files within a single submission. You will see the UI for that on the "APK Files" tab in Developer Portal. Thanks!
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