Source: https://linux-hardware.org/?view=os_display_server
Reporting is done by users who voluntarily upload their system specs via
# hw-probe -all -upload
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
Are you serious? Every sane desktop is working on accessibility. I recently heard from System76 that they're putting in the effort for COSMIC, we have GNOME focusing a portion of that €1 million they got from Germany, on accessibility (last I heard, they're working on cross-desktop solutions). Now, I don't remember hearing much from Plasma on accessibility, but I think it's fair to assume they're also working on it.
User skullgiver provides an excellent answer as to why. It's a shame, but it's a reality that most apps won't expose themselves properly, and hence accessibility is over in Wayland. Despite their excellent efforts.