It could work similar to vrchat’s hand gestures, when holding a certain pose with your hands it will show emotion on your avatar or a hand animation.
The index controllers have pull and grip depth tracking, would be interesting if they made the full body fingers move with it.
RecRoom has discussed adding full body tracking to the full body avatars, but it’s been a while since they were added and still no fully body or finger tracking yet
I’d personally be using the sleeping animation if they added it.