I think you can think about passkeys as an equivalent to username + password. Supporting usernames + passwords on your site does not prevent you from also suppo

I think you can think about passkeys as an equivalent to username + password. Supporting usernames + passwords on your site does not prevent you from also supporting SSO - it's just a auth mechanism you might use to grant access to an account, on top of SSO, Passkeys, email sign-up link, etc