Just for the heads up google are going to change to this.
Starting in August 2021, new apps will need to:
Publish with the Android App Bundle format.
Use Play Asset Delivery or Play Feature Delivery to deliver assets or features that exceed download size of 150MB. Expansion files (OBBs) will no longer be supported for new apps.
Target API level 30 (Android 11) or above and adjust for behavioral changes.
Starting in November 2021, app updates will be required to target API level 30 or above and adjust for behavioral changes in Android 11. Existing apps that are not receiving updates are unaffected and can continue to be downloaded from the Play Store.
The switch to Android App Bundle delivery will also impact instant experiences using the legacy Instant app ZIP format. From August 2021, new instant experiences and updates to existing instant experiences will be required to publish instant-enabled app bundles.
https://developer.android.com/distribute/best-practices/develop/target-sdk
As far as I can see it only applies to new apps only, For now