RMG – help with a problem.

Hello. I recently started learning how to use the map generator and added new objects that should be on the map (like Sylvan trees, a Temple from the Dungeon for dwarves, etc.).
I encountered a problem: these objects are not guarded by mobs (for example, like mines or arenas).
Could someone who knows how this works please tell me how to make these objects guarded? Also, in my opinion, a tent with artifacts or a fort on a hill should also be guarded by mobs.