Adding Simulation nodes to end of Geo Nodes disables the rest of the node tree

[Tedri_Mark]

I’m sure there’s a rational explanation that someone can explain to me but it seems like I can’t combine simulation nodes with any other form of geometry nodes

Simple example:

(Scene time ‘Frame’ output’ is driving set position)

[SFN]

This is intentional, the input to the simulation zone is evaluated only once on the starting frame. To include the frame counter you can link it from outside the zone, but the set position needs to be inside.
See the documentation for more details, but it boils down to the fact that you need a fixed starting point to simulate from.