Coming from the future, I created a fork with a patched version of moonlight-qt that works with Armbian 25.8.1 using vendor kernel 6.1.115 and Gnome as well as the mali blob g610-g24p0-wayland-gbm and of course, rkmpp.
The performance is great.
In a nutshell, what I actually patched were the direct OpenGL calls since these were not directly exposed in OpenGL ES that the mali blob uses.