Add Login By phone number(OTP) to Login/register Form

Hello ,

I was trying to add a button to the login and sign up form ( -OR- Continue with phone number // and to use Firebase authentication).
I couldn’t find any compatible plugin for that.

The case is: OTP works fine and code is successfully verified , but user still logged out .
In some cases user is logged in but when trying to checkout the cart , website ask to login again.
Both cases Logging in does not redirect to the specified page & I have this error: “A username and password must be provided. Lost your password? ”
though logging in with OTP only should be enough.

Any help with that??.. Is there any other ways to do so?

Thank you,