How do I add firebase mobile number login in app inventor?

How to add firebase mobile number login in app inventor

It's possible that there is an extension to do this, but there is no way in base App Inventor to add this functionality.

Can you give me that extension

Why not search through Taifun's extension directory

There is no any firebase mobile number login extension

Then do it yourself without an extension:

Also

https://firebase.google.com/docs/auth/web/phone-auth?authuser=0