And I'm not saying that the devs don't care or not doing wonderful work... just that they've ended up with a codebase where something like this is genuinely hard to do.
And when they'll finally get it will still be frustrating as hell because >50% of the time it would jump to some unreadable transpiled code because there's no actual standardized way to jump to the original source the final js got transpiled from. In an ideal world, if some React component was written in OCaml mixed with Clojure and transpiled to JS, I'd want to be able to jump to the implementation into that actual original OCaml or Clojure code. But I get it, whoever would be smart enough to get that working reliably would probably make better use of their time trying to cure cancer or solve climate issues or go to Mars etc.
</rant>
Your right it is the absolute worst possible behavior.
I get that information when I hover over the method/class/whatever.. I am looking up the definition because I want to see how this works.