So the celestial at omnipotent were definitely confirmed gods which is why they were there and Zeus was their leader as he leads the entirety of omnipotent city this means if we have any statement about Thor being one of if not the strongest god he’s celestial tier as he would scale to at minimum the two celestial at the city and according to Thor
Thor: We could pull together the greatest team ever. We could recruit Ra, Hercules, Tūmatauenga. Quetzalcoatl, maybe. And Zeus, the oldest and wisest of them all.
Thor considers those to be the top tiers at omnipotent city meaning they should all should scale to the two celestials at omnipotent city or no for being at the top of the hierarchy among gods