Ask questions of my vault using AI?

I’m looking for a way to “ask” my vault questions, exactly like the recently released AI Q&A features in Notion. Sure, quick switcher and vault search can be useful when I know the exact word I’m looking for, but I’d love to type something like “What do I know about …?” and get an answer, with the respective links, based on everything in my vault.

Does something like this already exist?