Please help with the commands. I don't know English well and I didn't find any examples in your wiki for spawning mobs in a certain dimension, there is only about the ban and it concerns an individual mob, not the whole mod.

I need to make it so that, for example, certain mobs and from the entire mod, spawn only in a certain dimension.

Sons Of Sins
sons-of-sins-1.20.1-2.1.6.jar

For example, I have such a mod, I want mobs to spawn only in the Neher, how do I do this? And where will it need to be registered in spawner.json?

Вы можете использовать примеры в вики, чтобы появиться в обычном мире и просто изменить измерение. Это буквально то же самое. Ищите примеры на spawner.json.

Which of these examples can I use?

You can use the examples in the wiki to spawn in the overworld and just change the dimension. It's literally the same. Look for examples on spawner.json