There’s a little bit of information in this topic: https://forum.audacityteam.org/t/multi-channel-recording-in-audacity/15644/1
We are dependent on users providing this information, and sadly, few do.
MacOS seems to support multi-channel devices better than Windows, because the manufacturer’s usually provide multi-channel drivers for “core audio” (the native sound system for macOS). “Some” manufacturer’s provide multi-channel drivers for WDM or WASAPI (native sound systems for Windows), but others only provide multi-channel Windows drivers for ASIO. Audacity supports Core Audio, WDM and WASAPI “out of the box”, but supporting ASIO is problematic due to licensing terms.