Thanks for looking at that! stefan11111 seems to be contributing quite a bit, over there. Looking at stefan11111's github repos, I see some interesting things I may need to consider.
I did notice stefan11111 has a fork of Tinyx, and Tinyx pull requests, at github.
The GLX (EGL), for xfbdev, is interesting
Looking through the Gentoo work, by that contributor, sheds a little light. Could be just trying to merge those interests into xlibre, as it was likely not gonna happen at X.org (no criticism intended, there is legitimate reasoning there).
I don't care for all of the xorg/xlibre/wayland "noise", but it would be nice it some good things "quietly" came out of it.