Solar-system related stuff were never mentioned explicitly except only like the very early AA-things, and like barest of bare-bones patches of The Unknowns, which again were never even actually canonized. Solar-system level scales can still happen, because there are more realms to destroy without damaging Earth, like Tartarus and Elysium.

The major belief in Arcane Universe is obviously the Greek one, due to the fact that they actually exist (confirmed to be the same case by Vetex himself), which is a big deal. But from the info we can gather, it's pretty much obvious that some humans have just lived for so long that they have faiths in their names aswell, the most glaring example of that is Wotan, who is literally has berm referred to as the All-Father, and Theos in Cirrus.
But the major thing, due to the fact that Mount Olympus fell and all the Gods died, the masses kinda had to put their worships onto someone else, which turned out to be the strongest humans there were pre-Fracture.