Hey, I'm one of the Typst developers. This is great!

A few remarks:

• The thing with the script letters is interesting. Are they even part of Unicode?
• Widehat is available, it's automatic if you write $hat(x+y)$
• doteq is $dot(eq)$ because the dot is an accent
• Maybe there can be an explanation for scaling: They scale by default if the symbol is entered directly as a codepoint, they don't scale automatically if you use symbol notation like $angle.l$
• The examples for the h function are missing a hashtag because the function consists only of a single letter
• The alignment example is a bit weird since it would look the same without alignment, but I guess that goes for the original LaTeX version, too
• $"9.8" "m/s"^2$ would work for the units thing, but it's obviously hacky and not good. Typst needs to support this better.

PS: Would you be fine with us posting this on Twitter with the Typst account?