Quest 3's 'Wide Motion Mode' increases the hand tracking volume by also tracking your arms. - UploadVR
Quest 3 'Wide Motion Mode' Expands Hand Tracking Volume By Tracking Your Arms Too
To read more about Quest 3's new Wide Motion Mode that expands hand tracking capabilities with inside-out upper body tracking, visit the source at UploadVR. This feature allows for estimation of hand positions when they are occluded, enabling wide motion actions previously only possible with controllers. It is noted that fingers will remain frozen until the hand is back in view of a tracking camera, posing a challenge for developers in games, and that Wide Motion Mode is exclusive to Quest 3.
Source: https://www.uploadvr.com/quest-3-hand-tracking-wide-motion-mode/