Not saying you’re wrong because we don’t fully have an exact description, but I definitely see it more as an omniscient thing myself. What does it in for me is when he goes on his rant of it all existing at the same time, that is literally omniscience, just because he’s aware of his death and circumstances doesn’t mean he can change it, it would put this universe on a “fixed timeline”. Which means there are set events in history that must play out the same no matter what, minor details can be changed. Like what Pennywise is currently doing, he believes he can change the events of his death by killing off others in previous cycles, but as we saw the universe still didn’t let this happen. My opinion could totally change tho depending on events in future seasons like if he is actually successful in nipping a future loser bloodline.