I'm not sure because to be omnipotent is to be powerful then all meaning there can only be one

And if the omnipotent being decide that there are two omnipotent being and then kill the second omnipotent being

Omnipotence is so complicated to be fully understand by us, it is my point of view

There can only be a single omnipotent being, the moment that one is stronger than the other or both possess the same power them neither of them is truly omnipotent.