I was going to request some way to pin or star notes within a folder. But your variant with showing starred item in File Explorer is much better, since it’s using existing feature and requires only UI changes.
Couldn’t this be a feature request to enhance the core plugin Starred? And if that were to happen, mayhaps a UI gesture, i.e. right click, to star or unstar notes in the file explorer. Don’t know about any but else, but starred notes come and go in my vault.