Saves aren't syncing between two PCs or a Steam Deck
Symptom
Your progress on one device doesn't show up on the other.
Turn on Steam Cloud for Silksong: Library, right-click the game, Properties, General.
Restart Steam on each PC. Some players also suggest verifying game files, clearing the download cache or changing the download region. Nobody has confirmed these work.
Still not syncing? Copy
user#.datandshared.datby hand between the numeric folders on the two PCs. Or turn Steam Cloud off and back on for this game.
Unverified: The restart, verify-files, cache and region tips come from forum replies and aren't confirmed.