AFAIK, KaTex has accessibility via MathML included, but it doesn't provide an export as image - it rather renders as html. So why would you want the utility that you use to render an additional image to take care of something that KaTeX already does?
True, my knee jerk reaction came from seeing this run in the browser... but that does not change the question. RaTeX advertises itself as a renderer for native apps, but how are those apps supposed to implement accessible controls? Does RaTeX offer anything towards that?
I'm working on a Neovim plugin to render LaTeX in Markdown, and I'm struggling with this. Why is it so hard to simply render an image from KaTeX?