Try setting your face as Face ID on your BFs phone and see if it works. Likewise, get your BF to set Face ID on your phone. See what works.

If your face on his phone works, and his face on your phone doesn’t work, then the problem is your phone and you can take it to Apple for repair/replace.

Otherwise, still take it to Apple and get them to troubleshoot.

The mask setting is hit or miss. I’d recommend just turning it off. I found when wearing a mask that I’d have to tilt my head forward and have the phone pointed directly at my face for it to register.