No, I couldn’t find a solution because there is none… Passwordless is not officially supported for direct authentication… One is supposed to use the universal login with redirection on auth0’s website…
We currently dropped support for email in our app and only rely on sms… This is a big shame and as it is not officially supported, the workaround with default directory (allowing only one connection sms versus email) could be removed anytime, leaving us in a very bad situation…
I very much regret this decision and my team and I are thinking about an alternative to Auth0 to address this problem.
Here are the posts I found saying this explicitly: