I think KeypassXC already provides plain text export and Bitwarden provides some export as well. I guess eventually either passkey ecosystem will become locked to a few specific vendors that won't implement functionality FIDO does not like or passkeys will be extractable. In first case it'll become vendor locked corporate standard, in second - same as passwords with url verification.
Or it can stay a niche standard most people don't care much about, we'll see.
Or it can stay a niche standard most people don't care much about, we'll see.