I am also very interested in when trackers (Vive Tracker 1.0 specifically) will be tracked via OpenXR. I am using it in unity 2020.3 but it seems that it's not supported yet. Until support is available what other options do I have? Can I use OpenVR for the headset and controller tracking, and use SteamVR at the same time to track the tracker? Or is only one API allowed at a time?