It builds the troop from scratch so its individual enemy
Viewing post in RPG Maker MZ: Map Troops comments
Similar to the control you have in the database options for troops like determining the x,y coordinates, the amount of enemies encountered and which enemies show up together as a troop. And maybe rarity of a certain map enemies showing up (if that's possible).
Currently it's a bit too random for how I'm trying to balance my project, especially the early game.