I put v1.0.0 in my 1.18.2 Forge instance and started the game. I then entered a world, exited the world, and quit the game. Upon going to the configs folder and the serverconfigs folder, I can't seem to find anything related to this mod? Is there no config implemented yet, or is this some kind of bug, or am I just missing the config because it has a strange name?

Currently, there are no plans on adding a config for the mod.
No file exists.

A... mob mod... with no config?

So every end-user has to make an entire datapack if they want to alter mob spawns or anything?...

Hm... Aaaaaalright then.

Feel free to make a PR and add a configuration whenever you want.
Priorities exist, and as I said, at the moment there are more important things we are focusing on fixing.

Since Minecraft version 1.19, Forge introduced a new system to control mob spawns through datapacks. Doing it from config files is no longer possible and this should be the preferred way.