Very niche case use, and the only other related post I can find used a different pair of glasses.

Mine unfortunately can’t just be plugged straight into the Nitro Deck+, but needs to have the included USB c to HDMI, then a powered HDMI to USB C adapter. It works fine (with audio) at that point.

The powered HDMI to USB C adapter I used was this one: https://amzn.asia/d/90FQYfo

I’m ordering a USB C splitter cable and hopefully that will reduce the number of cables needed.

Hope this helps anyone else who happened to have this specific issue. 😅