OBS now supports 10-bit and HDR with version 28.0 Beta 1. The EVGA XR1 Pro is one of few devices that can now fully support HDR recording and streaming. OBS have called out the EVGA XR1 Pro as a supported device with the new release of version 28
Learn more here
https://github.com/obsproject/obs-studio/releases/tag/28.0.0-beta1