OK. Anonymous publishing of APKs is gone. No sideloading, no Obtainium, unless KYCed. This will fix nothing (there are many people who will gladly KYC for a bottle of vodka), but introduce control into Android, that was pretty open so far. The minority of @GrapheneOS and similar will be still free. We need to move to PWAs.

Android Developers Blog

A new layer of security for certified Android devices

Starting in 2026 and in select countries first, Android apps must be registered to a verified developer in order to be installed.