Android Developer Verification: FAQ
developer.android.comThus is quite interesting IMO, the fact that it will work on apparently all devices with no version limit will probably be a surprise to many.
I suspect, given the fact that ADB can bypass the requirement, that Google is using the pre-existing Android mechanism to gatekeep app installs which is currently used for Google Play Protect. The Advanced Protection variant of this removes the "Install anyway" option [1] which is quite irritating, either you have to install every new F-Droid apps from ADB or disable Advanced Protection which I ended up doing.
(I wonder if Shizuku can be used to install apps without a PC? Haven't tried myself)
[1] https://support.google.com/accounts/answer/9764949?hl=en
> the fact that it will work on apparently all devices with no version limit will probably be a surprise to many
Yep, and it'll be a sneaky update via Google Play to update the Play Services in the backend that kicks it off.
> (I wonder if Shizuku can be used to install apps without a PC? Haven't tried myself)
AFAIK Shizuku runs as the ADB user, with the same permissions, so it's very likely it can install apps without having to connect to a PC