IJobForEachWithEntity using only one thread?

I use IJobForEachWithEntity to manipulate some values in the entity, but this Job works only on one core. Why is that and how can i parallelize those operations?

Do you only have 1 archetype? It’s split per chunk per thread.

I have only 1 archetype. If it works like that can I just use bunch of IJobs with EntityCommandBuffer?