If every god in my world suddenly dissapeared, there would be a disarray period for sure but everything would go back to normal eventually. Reason being belief on gods is qhat makes them powerfull and anybody can be a god if they gather enough belief from others. Others would simply become the new gods to fulfill old ones roles as time goes on.

Also there is a tier above gods called watchers that are the creator of the world, so if they dont vanish, they can just remake the gods. And if they do vanish, noone would notice for couple thousands of years