Are there any mods known to stop souls from dropping? Do souls only drop from default mobs?

Specifically, I finally got the soul scythe, then went through a dungeon from a mod that had a high spawn rate and got 0 souls even after an estimated 300 kills.

So before I go trying to kill overworld mobs in a field and hoping for the best, I wanted to ask here.

Thank you

There aren't any mods I know of that stop souls from dropping. I believe you were killing mobs that don't drop souls (ex. undead mobs) which is why you weren't getting any. Please refer to this link for creature souls and this link for boss souls. These tags can be edited to add/remove mobs using datapacks but they show the default list of mobs that drop souls.

Yeah, I will add some native compat in the next update, though the bosses should be done from the other mod’s end since it uses a common tag. Mods like Bewitchment utilize the bosses tag so that mod should work, for example.