Yes they could, and then they could get them back at any time. And even with half they would still be omnipotent and unbeatable. They’re omnipotent, even half of infinite incomprehensible power is still infinite incomprehensible power
I think I misunderstood the question with my first response but this is my answer now: omnipotent beings have an infinite amount of power, cutting infinite in half is still going to be infinite no matter what you do. Does that make sense?
@Ryan0721 Yeah an omnipotent could destroy their own infinite power and make themselves powerless if they wanted. And then they could give themselves back their own power if they ever got bored of that