Gods were worshiped by people living in different planes, different realms. They were powerful beings that created the universe. But they aren't the only powerful beings in the cosmos.
There were Guardians, powerful creatures that guard each realm.
Then there were people — powerful humans who were able to create their own plane. These people came from humble abode. A cultivator from another realm, a mage, a powerful divine beast, a witch, and many others. They grew up in a mortal world and trained themselves until they were able to become as powerful as Gods.
Then they created their own planes or realms where they lived with their families. Some of them ascended and became Gods themselves that were worshiped by the people living in their realms while… some just rot away. Some of them found immortally lonely and so they found mates and chose to leave their planes to travel the cosmos.
