To clarify, for Passwordless to work with the new Universal Login, you must pass the connection parameter and its value (either sms or email) to the Auth0 Authentication API Login endpoint.
Yes, you’re most welcome! Passwordless with the New Universal Login was released earlier this year. Take note that this feature is still in the Early Access stage.
Passwordless with the New Universal Login should be available to you already and require no further steps on your part. Have you gotten a chance to try the Passwordless flow with the New Universal Login?