I don't know if they are supposed to work with MCA reborn villagers but things such as fishermen fishing, clerics healing players and butchers feeding animals etc, does not happen with mca villagers. However, if I spawn a vanilla villager everything works, the rest of the mod works with mca.

I forgot to mention I tested this in 1.19.2 versions of both liberty's villager mod and mca reborn 7.40 along with 1.193 versions of both mods as well.