"Verified Developers" are coming to Google Play.

Yes, this even applies to sideloading applications. Yes, sideloading will still technically be allowed, but only if the app comes from a verified developer.

Sideloading apps from unverified developers will be blocked on certified Android devices/OS, regardless of how you obtain the APK.

It seems the only way to install apps from nostr:nprofile1qqs83nn04fezvsu89p8xg7axjwye2u67errat3dx2um725fs7qnrqlgpzemhxue69uhkummnw3ex2mrfw3jhxtn0wfnj7klqyqq in the future might be to run a custom ROM such as Graphene, etc.