Apotheosis

Hey, I’m creating a modpack for 1.20.1 on forge and there is around 300 mods, many of which add mobs but there is such a low, nearly nonexistent spawn rate of mobs from certain mods in the game. At first I thought it was an issue with spawn weights so I installed ‘spawn balance utility’ and modified it to increase spawn weights but it’s just not making any difference, I also think it could be that the mobs from those mods can’t spawn on modded grass (I’m using BWG). Please help!