The common claim that the entire ANE all believed in a Three Tiered Cosmology and that it is even thought in our own Bible is a common annoying claim. Those who present such ideas miss the simplest observations to maintain their narrative. Steve Hays once wrote:

Critics of the Bible like to belabor the triple-decker universe. This overlooks a number of considerations.
1.The Bible employs a double-decker formula (e.g. Gen 2:4) as well as triple-decker formula (e.g. Exod 20:4).
Given this stylistic variety, there is no reason to privilege the triple-decker formula over and above the double-decker formula.