I don't think it's feasible to implement that unless tsserver provides some fitting API. I think the only option now would be to iterate through all symbols in the file and trigger requests for all of them to get references/implementation which we obviously won't do for performance reasons.

Is there any chance that someone could work on this codelens support.

TypeScript Language Server is beautiful and can manage advanced features like inlay hint, but references codelens is a feature which misses.

Thanks!

Actually there is an API for that in tsserver and VSCode supports that functionality already.