collision_geo is not detected in unreal engine 5.5.4, I'm on houdini production Build 20.5.584, what can I do?

Hey,

Have you tried refining the proxy mesh output ? (right click > refine)
By default, the plugin uses Houdini Proxy meshes (that's why there's a Houdini logo on top of Flippy).
They are much faster to create than StaticMeshes, but wont come with LODs or colliders.

The idea is that they will give you faster visual feedback when tweaking the parameters - and can easily be refined when you're satisfied with the results.
Proxies can be disabled either in the plugin settings, or in your HDA's detail panel.

For as far as I know this is a consistent bug in 5.5.4, and is resolved in the later versions. That being said, according to UE and USD importers, it might resolve switching off the Never Needs Cooked Collision Data toggle under the Collision>Primitives tab.