After all the ruckus recently about the Dolphin Emulator for Wii and GameCube coming to Steam, and then being blocked - the team has now given up with the Steam release.
I kinda doubt Steam would allow for cloud saves on an emulator because they wouldn’t want potentially copyrighted data ending up in Steam cloud saves if a game saved DLC content or something to a save file. RetroArch is on Steam but I don’t think it supports cloud saves last time I tried it on my Steam Deck. In RetroArch’s situation, the non-Steam version has more core support than the Steam version so I end up using the non-Steam version (which is also provided via EmuDeck).
I kinda doubt Steam would allow for cloud saves on an emulator because they wouldn’t want potentially copyrighted data ending up in Steam cloud saves if a game saved DLC content or something to a save file. RetroArch is on Steam but I don’t think it supports cloud saves last time I tried it on my Steam Deck. In RetroArch’s situation, the non-Steam version has more core support than the Steam version so I end up using the non-Steam version (which is also provided via EmuDeck).