How to get Xfinity Authenticator to work on my iphone.

I'm trying to secure my phone in every way possible. Fraudulent SIM Swaps are on the rise, especially if you use your phone for banking, cryptocurrency transactions, etc.

I downloaded and installed the Xfinity Authenticator App. However my home Xfinity and my Mobile Xfinity do not prompt me for an Authenticator password to get into my accounts.

How do I activate this?

Is there some other way to create a PIN password or something that will stop a hacker from transferring ownership of my phone to them, in case they get a hold of my regular user name and passwords?