The thing is … age verification laws are (currently) restricted to social apps. They are designed to target centralized walled garden “app holds the identity” architectures, cause that’s the only way apps are made these days.

The definition of “social apps” in these laws varies, but generally has plenty of “forgiveness” so that apps that have a social layer but are not “primarily social” (like room sharing or ride sharing apps) might not have to comply.

The Nostr network (will) represents all of these apps and more. A key manager/signer app that does NOTHING MORE than this has no control over what social apps the user will be using their keys with. There is plenty of room for arguing plausible deniability… when the business concerns are cleanly separated into independent apps.