Typst is the markup language that will kill LaTeX, in case you didn’t know, and the current syntax highlighting in Kate is very lacking in the math mode part (I emailed the author and they agreed that they gave this the least attention). It renders everything the same color, whereas the IDE on the Typst website and on other editors like Sublime the syntax highlighting differentiates between functions, numbers, brackets, etc. IOW the usual syntax highlighting stuff you’d expect.
Math mode is the heart of Typst so rendering everything the same color defeats the purpose of syntax highlighting, and it would be nice if I didn’t need to resort to other editors every time I want to edit Typst documents.