Earlier quoted context omitted.
typst people on latex posts are like Rust people on C++ posts :) (and I say this as a Rust programmer). With regards typst, I will consider it when there is any kind of accessible output -- at the moment it only seems to make PDFs, and those PDFs are entirely inaccessible by blind people.
Because the PDFs only carry an image? (I'm assuming if there was real text the tools could extract it, but could be wrong)
You can annotate a PDF with the raw actual text, which is then used by screen readers, but typst (and LaTeX currently) don't do this. It certainly isn't trivial to do, but it would be useful.
The other option would of course be to produce HTML, which (unless you do horrible things) is generally very accessible, but neither typst or LaTeX do this well (LaTeX does it OK, but I find I usually need to clean up the result).