In an HDA I am creating a primitive group based on a material. The HDA gets the asset in Unreal, and then I would like to manipulate the UVs. In the group drop down of the UV node, I cannot see the created groups in Unreal. Is it possible to create new groups within an HDA and see them in Unreal?
Basically, how can I assign a Primitive group within an HDA and pick it up in Unreal?

It seems using a uasset within an hda, you cannot set primitive groups. I have to reference the Source File asset of the uasset, manipulate the geometry as needed, export the fbx and reimport the uasset as uasset.

Besides the reimporting of the uasset in Unreal, everything else can be handled in the HDA.