If I create a singleplayer game, Villagers spawn with MCA skins like normal. As soon as I transfer the world to Realms or even just make a new world in Realms, no villagers spawn at all. Is there a step I am just not seeing or should it work properly or not at all with Realms?

Yeah, nevermind. Just learned mods don't work on Realms. . . which is stupid, but what can you do.