When you upload an APK, it needs to meet Google Play’s target API level requirements:
New apps must target at least Android 9.0 (API level 28)
From November 1, 2019, app updates must target at least Android 9.0. Until this date, app updates must target at least Android 8.0 (API level 26)
Therefore, the infrastructure must first be brought to the required level.
Further changes can then be made.
from https://developer.android.com/distribute/best-practices/develop/target-sdk
Therefore, the infrastructure must first be brought to the required level.
Further changes can then be made.