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Google gives Android users a way to install unverified apps if they worked hard for it(including waiting 24 hours)
(android-developers.googleblog.com)
This is a most excellent place for technology news and articles.
As far as I understand the enforcement depends on privileged play services. https://xcancel.com/Metr0pl3x/status/1960329785277571420#m
That's better, at least. GrapheneOS users should be fine at least since there are extensive restrictions on Play. Other Android ROMs may have issues, though. Maybe not if they use MicroG.