Hide NPCs from Being Used

I like that we can now define starting NPCs for a world. Very cool! But I don’t like that it takes every single NPC as a playable character. As a worldbuilder, I’d like to have the option to also hide or lock certain NPCs so that they are not visible for selection when someone starts the campaign. I have some NPCs defined, bosses and the like, that I want the user to encounter and deal with, not necessarily play.