Tracking Hand model with skinned mesh and moving fingers

Hi, I have a hand model that is in FBX and I'm exporting it to USD in Blender. I get a skinned mesh and while I can track the whole hand how do I track each joint and assign it and animate the skinned mesh itself. All my attempts say this is not possible in RealityKit as of now. True?

Tracking Hand model with skinned mesh and moving fingers
 
 
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