Sounds like he could benefit from TRAMP…

For reference https://github.com/typst/typst

Looking quickly at the spec, I don’t think much of the typst functionality would be used by an org exporter.

If you are interested in such an exporter, I’d recommend you put together a description of the mappings that you’d like to see. That is, what org features do you need and how does that translate into a typst feature; I’m not asking for an implementation, just guidance on the scope of a first-pass at the exporter. That will give someone with the technical skills to implement an org exporter guidance as to what features to focus on.