Five quick presses of the lock button does this too, but beware as I think the default behaviour also starts a 3 second countdown to calling emergency services.
Pressing the power and a volume button for >2s (the same combination as shutting down the phone) also disables faceID and does not call emergency services.
Can they force you to look at your phone though? Attention aware Face ID requires eyes ball on screen.
And as others have stated, holding volume up and power u til the iPhone vibrates locks the phone requiring the passcode.
Five quick presses of the lock button does this too, but beware as I think the default behaviour also starts a 3 second countdown to calling emergency services.
Pressing the power and a volume button for >2s (the same combination as shutting down the phone) also disables faceID and does not call emergency services.