For everyone confused by the developers words, this game runs on quest. What they meant to say was that it doesn't run NATIVELY on quest, so you'll need to play the game on your PC with a VR headset connected.
you need a cable, possibly get one from amazon, like mine who's a kiwi design 5m for the quest 3
then you need to install the meta quest link app for windows and steam vr
from the quest 3 quick menu you select "open steam link" and from there with the steam vr you select your windows desktop and open the exe game from there
Get the Oculus App software, then connect your quest via air link or cable link. Then open the game via Steam VR after adding it as a non-steam game to your library.
Meta guide for the oculus app