One thing on this that struck me hard was the realisation that the very concept of “the world” as a total thing, as opposed to the component layers of earth, sea, sky etc, post-dates the Genesis account, coming from the Greek concept of cosmos.
One can confirm that by seeing how the “Babylonian world map”, although created at a time of Mesopotamian expansionism and extensive trade, limits itself to part of Mesopotamia, as here. That has be significant to a flood narrative that has its origins in the very same region.