I’m aware of the existence of the EntityCulling mod, but since this is a culling mod entity culling would be a cool feature to be added!

Sodium has entity culling, and I don't feel like implementing async currently. So I'll add this to the todo list

There's a mod called "Entity Culling" that already does the job.

There's a mod called "Entity Culling" that already does the job.

I already mentioned I'm aware of that:

I’m aware of the existence of the EntityCulling mod