Quest 3 Steam Link - Video, but no Audio?

I just got my new PC streaming to my Quest 3 via Steamlink (after much trouble). As the title suggests, VR comes through nicely, yet absolutely no audio, even if I plug headphones into the Quest.

My PC does not show the Quest in audio devices no matter what I do. It DOES show up if I use the Quest App on my PC, which I can get audio through, but I can't use that app at the same time as Steamlink.

I haven't found any setting or updated any driver that's made a difference. Why won't audio come through?