As a tip for macOS users who maybe don’t know this: Theres a similar feature in every macOS app when you click the “Help” menubar entry of an app and enter text into the search field there.
It’s also one of the reasons I’m a big fan of global menubars: they act as a sort of index of everything an app can do, and the menubar is always present anyway there’s no point in devs not utilizing them.