I was wondering if I could somehow alias * to dot.c.

First, I tried doing it through #show "*": [#sym.dot.c], but that doesn't affect math mode AFAICT.

My second attempt used #let dd = symbol("·") which does work, but only allows me to use dd as an alias for dot.c, but symbol doesn't currently allow setting a custom shorthand.

While both changes would fix this for me, I think they individually provide enough advantages to warrant implementing both of them.

I.e. some way to create a math scoped #show (e.g. #show.math or something like that) and allowing to add a custom shorthand to symbol, not sure how that syntax would work, maybe just as a named parameter.