SkinGen Layers not available in Unreal

When exporting with UE5 preset (no bakes, all boxes unchecked, nothing embedded), and then importing into UE5 via the AutoSetup Plugin, I should be able to see and interact with the SkinGen layers, but this is not the case. All I get is a flattened diffuse texture that has all layers baked into it.

Anybody know how to fix this or which settings are at fault here?

The SkinGen layers currently do not support any AutoSetup plugins, more specifically the CC Character exported (.fbx .obj …etc) to third-part software the SkinGen layers are inevitably flattened.