Hi, have you tried basic avatar example from https://github.com/3DiVi/nuitrack-sdk/blob/master/doc/Unity_Avatar_Animation.md ?
One possible reason for this is that you are too close to the camera, so the hands aren’t visible and are being set to the default pose/position. The best option is to re-check in AllModulesScene (with explicit depth frame visualization) from the official Unity Package.