Which makes no sense, if the property is in Android itself.

For example, lots of people use phones without any google play framework installed. Without that framework, how does it "carry over"?

This just raises more questions about how this whole process works.

Is it only the play api doing so? If so, then if you de-google, this entire problem goes away?

If not, then how can you 'carry over' to a phone unless you also install the play framework? Seems like that's unhelpful.

If you don't have the framework, you don't have to worry about any of this (you also don't get the benefits, bank apps that require validated OS, tap to pay etc, without the framework).

AFAIK, all current versions of Android have Google Play Services. It's an essential part of the "official" Android.

If you run GrapheneOS, LineageOS or whatever, then it's not real Android, and the entire problem of your OS restricting you from installing apps does not exist.

This change was never relevant for devices without Play Services.

This notarized apps restriction only exists on Google Android builds, so the workaround also only needs to exist on Google Android builds.