Make alternate login methods not display by default
The way it will work is this. You will be able to disable showing other login methods for new users (users who have never logged in before). But.. we will have a link or button that will say something like "login with other method". If they click that, then the other methods will show. With this solution, we don't lose the ability to have account recovery methods for those users who want to use them.
In addition, those other platforms (SMS, Signal, and Telegram) will be usable for notifications in an upcoming release.