I use the USB-B -> USB-C charging cable that came with the controller to connect it, and yeah it works seamlessly with Steam that way. Again, I’m no programmer, so I don’t really know what I’m talking about, but from what I’ve seen in the DeSmuMe control settings window and in a few different games on Steam, the controller seems like it’s constantly sending some kind of status update to whatever program is using it, and those messages are getting read as valid controller inputs for the purposes of remapping controls. No idea if that’s correct or helpful but from a layman’s perspective that appears to be where the issue lies, so for those more capable than myself feel free to use that information in any way you can!