Use your HTC VIVE Controllers as Body or Feet Trackers! - YouTube
Sitting down? Turns out Oculus Rift owners like to play seated, too | TechRadar
Buy Oculus Rift S Hand Tracking Stuck | UP TO 57% OFF
I think i have the answer to full body tracking for the quest/quest 2 in stand alone mode : r/OculusQuest
Amazon.com: KIWI design Tracker Straps and Belt for Full Body Tracking VR, Compatible with PC VR Platform and SteamVR, Upgraded Hand/Foot Trackerstrap Accessories Fit HTC Vive Trackers (Trackers NOT Included) : Cell
Driver4VR: Body Tracking Kinect in SteamVR VRChat - with Oculus, Vive, Nolo - YouTube