As a criminal defense attorney, I will never own a FaceID device. Ever. I owned an iPhone 7, then an iPhone 8, then an iPhone SE 2020, then another iPhone SE 2020. I may upgrade to the iPhone SE 2022.
Cost is not an issue for me. I don't buy the iPhone SE because I'm cheap. I buy the iPhone SE because it is, on balance, hands down the best phone Apple makes right now for people who value convenience, portability, and security.
I tried the iPhone Mini when I broke my first iPhone SE while hiking. I don't trust FaceID to work when I want it to (masks, glasses vs contacts, etc. tripped it up). I don't trust FaceID not to work when I don't want it to. I ended up returning it and going back to the SE.
I don't think I'm alone.
They have also recently improved FaceID to work with masks on, so the situation has improved since you tested the mini.