I'm on A11 (107) and just did a factory reset and I can't for some reason find where to activate this feature. I had it prior to the reset. I assume it's there and I'm just not seeing it.
It's incorporated in the feature "double tap to lock screen", it's not a distinguished element.
Settings > Advanced > Gestures > First element of tactile gestures
THANK you. I was beginning to think I was crazy.