Version: untamed wilds 1.20.1-4.0.4
forge: 47.2.1

I noticed a major lag spike after adding some mods (mostly magic based mods and untamed wilds), so i decided to get a mod to control mobs when i noticed the /butcher command said 200+ hostile mobs.
In control mod: 1.20-9.1.2
The in control mod list what mobs and how many currently there are. I limited the populations spawn for several creatures of untamed wilds. Which spadefish and giant clams going well over 30 spawns even after i put limiters with in control. I cannot stop them from spawning or reaching to the 100+.

Can we get a config file to limit them, please?

I had the same problem with sawfish. I had to find a kill command, and killed over 2000 of them.