How do we know from the oddyssey that poisedon is not omnipresent?

In Homer's "The Odyssey," Poseidon is depicted as a powerful god but not omnipresent, as he is shown to be physically limited in his ability to intervene. For instance, he is unable to prevent Odysseus from receiving assistance from other gods, like Athena, who actively aids him. Additionally, Poseidon often reacts to Odysseus' actions from afar, indicating he does not possess constant awareness or control over every situation. This suggests that while Poseidon wields significant power, he is not everywhere at once.