I have not personally seen this done, but there may be a way to do it via a 3rd party app.
I actually saw this being done at an Adobe MakeIt event where they were previewing and showcasing Character Animator - didn't think of asking how to do it, but assumed it wasn't difficult. It was done with a mac and ipad - assume this may somewhat be easier than when using a PC (windows 10).
I've tested one or two apps, but with no real success - able to connect the iPad using these 3rd party apps, but only as a webcam, unable to get it to read into the camera on Character Animator. I've tested with a webcam as well, which works - so I assume it's got nothing to do with the driver updates, but with finding the right app out there!
Any help would be greatly appreciated!