Typst currently has cal as a calligraphic font (https://typst.app/docs/reference/math/variants/#cal), but it would be helpful to add the function scr as a script font. (See, for example, \mathscr at https://katex.org/docs/supported#style-color-size-and-font.) I need some of these alphabets in mathematical logic (when porting some my documents from written in TeX), but another example is the style used in the Hamiltonian of physics.

current cal in Typst

mathscr in KaTeX

My concern is that at least source code, cal is assigned in Unicode to the "Mathematical Script" series, so I think the only way to add scr would be "Mathmetical Bold Script", but have some doubts about whether that is reasonable or the point that there is also the issue of fonts.