Scripture is replete that God is all-powerful. "Nothing can thwart Thee, Nothing is impossible," etc. Scripture is so clear that God is omnipotent, that it is one attributed omni no theologian worth their salt can thwart. Sorry. Follow logically: If God is all-powerful (Colossians 1:16-20), He has to know literally all that is capable of challenging this power (omniscience). Why? Because He could not claim Almighty except to know that He is Almighty against any happenstance. Omnicompetence implies that He already knows, it already concedes the Omni's by assertion! (yes it does, you need to think more about the implications of logic, it necessarily does). Why? Omnicompetence means literally completely-able (implied) to win and never lose for one. To never be surprised by a move, else He isn't omnicompetent. Open Theism concedes the omnis by the admission. There are many theology and philosophy sites that prove this much better, but the logic isn't escapable: If one omni, necessarily all omnis. Some philosophy websites and Epicurus tried to say God couldn't have them all by incorrectly and with logical flaws to say if God was all-powerful, then why does evil exist etc. Freewill theists argue against these easily enough as untrue. Logically, if one omni, then logically all omnis else a person doesn't mean 'omni.'
One instance of objection: "Can God sin?" No "Then He is not all powerful." Incorrect. Sin isn't something to do with power. Faulty concept. While sinful men wield power, it isn't 'sin' that gives them that power. Rather power is abused, meaning sin is subservient (looking for a better term) to power, or uses power, is not power itself, nor an indicator of power.
I've seen no way out of the implication of one omni meaning all omnis without a fallacy in conception.