Agreed it could be improved fairly easily at this early stage, and even documenting 'standard recipes' would help. But I do think as a default, prefacing with a fixed string with fixed capitalisation is probably the wrong choice vs earlier systems which simply insert the reference number/letter itself and allow the user to word things correctly around that. Trying to make it do the right thing in context in a way that generalises across multiple languages is unnecessarily hard.
You can probably do that with a function given as supplement but it looks a bit involved, I think you'd have to do something like in this example: https://typst.app/docs/reference/model/ref/#customization
(I think the reference system is an area where things can be improved to main some common use cases simpler.)