Hi, Sailfish OS 4.5.0 that was just released includes also update for AppSupport to Android 11 API level [Release notes] Struven ketju 4.5.0.16
As a sidenote, AppSupport does not need to be running always the latest and greatest version just because it is newer, we need new enough version that is still supported by majority of Android App developers. Surely using a version that is within AOSP maintence for security patching is something we target to have for AppSupport.