Gravity to oculus hand component

I put a Pawn in the scene with a Oculus hand component in it.
When I do a preview via oculus link, i have hand tracking and in the blueprint the hand moves its fingers.

How do I add gravity to this pawn?
I tried many options enabling physics in the hand properties, in the pawn propertis, tried with character blueprint, etc.

The hand in the blueprint always move its fingers exaclty like mine, but they never fall