For added security from SIM swapping

I set up Google authentication on my account for the express purpose so that no one could log in with an SMS code yet you still give that as an option which defeats the entire purpose of setting up Google authentification! This makes absolutely no sense. How can I turn off the option to sign in with sms?

 so even after setting up Authenticator they give three options to sign in:

 SMS

 face ID

 Authenticator

 so of course it still leaves me vulnerable  to someone Sim swapping if they can log in with my SMS.
 come on T-Mobile wake up!