Abandoned applications delisted from the Play Store
Starting on November 1, 2022, existing apps that don't target an API level within two years of the latest major Android release version will not be available for discovery or installation for new users with devices running Android OS versions higher than apps' target API level. As new Android OS versions launch in the future, the requirement window will adjust accordingly.
This is a very welcome move, since finding incredibly old and abandoned applications is not an uncommon occurrence in the Play Store. Clean-ups like this almost make up for Google removing the last updated on" field in Play Store listings.
Almost.