Mod spawns villagers as ghosts, which are getting converted to MCA.

https://github.com/LunarEclipseStudios/From-The-Fog/blob/7c27b681ba09d2f0d89e5ec81752a707a976e40e/vanilla/data/watching/functions/events/door_open/create_door_ghost.mcfunction#L5

Easiest solution would be to listen for tags.