The spaces named by Steam
Steam says One fights through hostile floating isles and collapsing worlds while pursuing the Paradox. This supports an exploration mindset that watches vertical routes and changing ground.
Treat environment as context
The official text does not publish an area-by-area map. Use it to orient your reading of the landscape, then rely on in-game cues for exact routing.
Source
Q: Does Steam provide a complete map?
No. It names hostile floating isles and collapsing worlds but does not provide a full map.