I'm playing on mod version 1.22.8 for minecraft 1.20.1, and almost no mobs from the mod are spawning in any biome, be it vanilla or modded.
The only mobs spawning are the blue jays, rhinos, murmurs, skunks, banana slugs, and caimans.

Could this be an issue with the config?

Lmk if you find an answer, i'm in the exact same situation :')