Not sure why my thread was close as it was unresolved, as stated by nook that it's unsoported by the steam deck, here is a statement by the website "For all of those that have been asking, Aurora now runs on Valve's STEAM DECK! We have a nice tutorial video on how to get it working so that you can get your cheats on this new popular handheld. Note that our CoSMOS software is also running natively on the Steam Deck."
That statement doesn't say anything about us supporting it.
It says we have a tutorial on how to set up and get it working
CH offer a community based support in our steam deck board, but non any official support as per now.