Hi DJ_91505,
We see you have some concerns about the speed of Face ID.
Face ID is designed to be both very fast and also secure. On the iPhone 12 Pro, it is normal for it to authenticate at little more than a glance.
The easiest way to tell if Face ID is working properly is to look at the lock symbol prior to swiping up. If you bring up the Lock Screen, then look at your iPhone, you'll see the symbol change from a lock to unlocked. This signifies a successful authentication.
See more info about Face ID at the link below:
Cheers!