Not on Nostr, of course, as it's not a company or individual. But some Nostr-utilizing companies and individuals might get served papers. And, yeah, forget about getting listed in app stores. And, now, the EU is planning on making apps unusuable, unless they are downloaded from Apple or Google app stores.

Do you have a source for that? Because last I heard its the opposite where the EU mandates sidelpading to be possible.

Technically there is a way. But its not going to be an effective way. The worst they can realistically do is try and block the relays or put an age restriction on the app store downloads. But we dont depend on the app stores and relays will be wackamole especially if people put up relay proxies.

How are they hoing to do apps unusable? This is not clear to me...

I could see something like primal complying with it and everything else getting removed from the app store.

If I understand it, isn't this the exact use case for Zero Knowledge Proof technology? An encrypted app/tool that verifies you are you, but doesn't share the private information anywhere with anyone. It just verifies to the 3rd party that you provable meet "x" criteria. I think this is the vision of zorp/nockchain, but feel free to correct me.