Have a read !
Face unlock doesn’t work using smart lock
@truth_be_told can you help me cause I tried several times but never worked
Here what I did
First deleted old credentials
Created a pin password set smart lock to faceunlock
Matched my face in the circle turned green.
Pressed the power button turned off screen
Turned on screen with lock screen kept the phone at eye level nothing happened
Rebooted phone tried again nothing.
look for the lock symbol at middle bottom of screen. If its locked means phone is in locked state
the moment you look at screen it will unlock & u can swipe up to check
There is no confirmation except that symbol at bottom. this is how smart face unlock works