EDIT: SOLVED
It turns out [Marginalia](https://github.com/minad/marginalia) is the which-key equivalent for Vertico.
ORIGINAL POST FOLLOWS:
Howdy! I'm trying to use `vertico`, but I noticed `which-key` no longer shows the keys for things when I use `M-x`. It still works with other keybinds, like `C-x`. Is there a way to make this work again?