You can play on Linux using wine.
There is also mod for multiplayer here: https://tylkodemon.itch.io/demp-for-raft
You should be able to copy save.rgd from C:/Users/<user>/AppData/LocalLow/Raft/Raft/SavedGames
Where are Linux save files stored? I'd like to add them to my windows version 1.05 in wine.
