We don't know yet what the KYC will look like.

Are you a human?
If so, you’re ready to make a profile! We use a special authentication system to make sure every user on Voice is an actual person. No robo-mobs. No catfish. No burner accounts.

This special authentication system could be anything from full data to one key data plus 2FA.

I don't know either what Yubico is bringing in ...

Let's wait and see. And bicker about it here in the meantime :)