I had to remove all the recent Kinect SDK and only use KinectSDK-v1.0-beta2-圆4 to register the KinectCam.ax and now in Skype I can see Kinect Cam option
Xbox One and Kinect.Image Credit: I have managed to get it to work with skype using the details in this forum (however it doesn't work with MS teams etc) Can-now-use-kinect-camera-with-skype.
Can I Use the Kinect as a Webcam?, Microsoft now lets you easily use Kinect as a webcam.