It looks like former Stadia exclusive Submerged: Hidden Depths is coming to PC, according to a Steam page that has now popped up for the game.
Submerged: Hidden Depths, a "relaxploration adventure" by Uppercut Games, was originally released on Stadia in December last year. It's now set to make the leap over to PC, although there's currently no release date listed on Steam.
As you can see in the trailer above, Submerged: Hidden Depths is a "non-combat third-person" game set in the ruins of a sunken world. Players can sail across the ocean between ruined buildings, and climb these structures to uncover hidden relics.