I have reason to believe the caves aren't being generated properly due to other conflicting mods in my modpack. Typically, the caves will generate as normal caves with occasional ferns, amber clusters, and neodymium nodes. The mobs don't reliably spawn either.
A few exceptions have occurred where the caves and their respective mobs do spawn properly but they're pretty rare. Maybe it's an intended feature.

A copy of the modpack is linked below but I believe the main culprits are Tectonic, Terralith, or Biomes O' Plenty.

https://www.curseforge.com/minecraft/modpacks/meat-cellar-project

I'd really appreciate if you could look into this and help me reach a solution.