Quick Help for keywords as well as symbols

Yes, I know that this is technically off-topic, as it's implemented via Xcode, but with the recent proliferation of Actors, async/await and friends I think it's becoming more and more relevant to day-to-day usage of Swift.

Wouldn't it be useful to have docs easily available for non-symbols, e.g. Actor, async, @escaping, internal, private, isolated etc...?

Radar: FB13703696

(Previous threads)

It would be nice if Quick Help was available outside of Xcode, e.g. via sourcekit-lsp. Or is it implemented already? I think I saw Qick Help popup windows in VS Code.