Unreal 5.2, i had same issue. Clotches didn’t react to physics collision for FBX model. Also i had some problems with scale collisions.
My solution for Blender:
- In scene properties set unit scale to 0.01
- For Armature and for Mesh set transfrom scale to 100. (key N in viewport)
- !!Most important!! Chose Armature and Mesh and apply transform (Ctrl + A)
After that can export to FBX as usual