It's just that Nvidia doesn't care much about Linux, and -as always- Nvidia ignores what everyone else is doing and does their own thing. Sometimes doing their own thing works out really well in the short run, but -long term- they always fall behind.
Nvidia cares a lot about Linux. Just... on their terms.
If your GPU is older than 5 years, then you're in danger zone and you should have completely replaced your hardware 3 years ago and bought new Nvidia equipment now 10x more expensive!
The biggest issue was Nvidia's insistence on buffer management with EGLStreams instead of GBM, which broke a lot of desktops. But they forfeit that fight ~4 years ago.
To summarize the difference between the two, with EGLStreams, you just request a buffer to draw into from a pool, then once you're done, you just submit it, thereby relinquishing control of it.
With GBM, you explicitly need to manage the lifetime and access of your buffers, making sure you don't leak or accidentally write it when the GPU/driver tries to, there's no clear ownership, and you have to handle surfaces for double/triple buffering.
It's a much lower level API, and much harder for drivers and app developers to get right, which was no doubt responsible for many years of buggy Wayland compositors - in fact, basically there wasn't a single correct implementation until Valve built Gamescope/their wlroots-based KWin fork and did a bunch of driver work.
Like most FOSS done by companies, what they don't care is GPL, which sadly will eventually be meaningless after boomer and Gen X devs that created the GNU movement no longer walk this plane.
There isn't a single embedded OS FOSS alternative to GNU/Linux that uses GPL, including Linux Foundation's own Zephyr.