@mateo_salta Sorry for the late reply - I check my messages infrequently.
@graphik_ I successfully built this on my device, but I don't think moonlight has Mir support, so it doesn't work for me. If you have a Wayland device I can describe the steps required to build and test it yourself.
I believe the limitation stems from libva which doesn't appear to have Mir support (https://github.com/moonlight-stream/moonlight-qt/blob/51b5f8046f1864e36cfa6efefbe2de71ef98ca92/app/streaming/video/ffmpeg-renderers/vaapi.h#L18-L31).