Help about modded world spawn rates

So I downloaded this modpack called Cave Horror Project, and when I progressed I eventually started making farms as one does (don't ask why I'm making one in a horror modpack) and for some reason, the spawn rates are abysmally low. Like I made a gold farm and instead of zpiglins constantly falling down, a pack only falls down every 20s or so. How do I fix this? Is it like this because of the overwhelming amount of mobs in the game make it hard for the game to spawn many or something?