Simulation nodes without geometric data.

I encountered a small problem when I tried to animate the movement of particles with "Simulation" in 4.0 and 4.1.

I want my function every frame update , and “geometry”no in the"Simulation".

my "Simulation"out a Vector to "Set Position" ,As a result, surprisingly"Geometry" did not move.

I don't know if geometric nodes can't be connected in this way, if they can't be connected in this way, it's a functional request. If my connection is wrong, I hope someone can tell me where the "user forum" ，and more geometric nodes uses .