The tricky thing with these "unofficial" distros is that they are generally maintained by either a single individual or a small group of people.
This is true for many accessibility projects actually (game mods, third-party UIs for inaccessible services/platforms, etc.). These are generally really meant as short-term patches while the problem gets fixed, except ... the problem often doesn't get fixed because the platforms in question figure it's been solved now and they don't need to care about it anymore.
Accessibility really only works when it's an ongoing, first-class process within an app/platform's design, and we can absolutely do that; the standards and guidelines have existed for decades. People working in cybersecurity, localization, general UX should recognize this song and dance, which is amusing because a lot of the tools of those trades have atrocious accessibility and require all sorts of workarounds, ask me how I know.
People just ... aren't including it in this way, which means people like myself (screen reader user and accessibility professional) essentially have to keep reminding people that we exist and that it's kinda shitty to keep forgetting about that fact or to decide the least amount of effort possible (LLM, unpaid volunteer, send in a PR LMAO) is enough to cater to people who have very real, very annoying and very constant UX issues we either crash into or crash through on literally an hourly basis.
seems like the real places to make durable changes would be in the desktop environment software packages (kde, gnome, etc)?
although it also seems useful to figure out which third party packages and default settings make sense.
It's because adding new shiny features is fun and adding accessibility is boring, and most people in the free software world are there to have fun. That's also why bugs are always forgotten while people keep piling new features.
The readme addresses this problem comprehensively. "The ultimate vision of Vojtux is "NO VOJTUX NEEDED!" because Fedora will be fully accessible."
It's not really a distro in the usual sense, more a minimal customisation of Fedora.