I am also having this issue I believe.
I have the Oculus Rift S, and I have downloaded the kinect runtime 2.0 as well as installed Driver4VR and when I go into the program and start it to calibrate the system, it will either say I have the kinect runtime 2.0 installed but cant fin the kinect, OR will let me start calibrating and not see my headset (plugged in and steamvr sees it.)
I have tried changing the USB the kinect is connected, too.