Hello.
I also face a similar issue.
I'm on a steam deck, with Steam cloud saves and CD Projekt 's cross saves / progression (occasional play on an Xbox).
The saved files folder show only png files for the last saves, there are no sav files.
It's the same on the steam cloud saves list (as one would expect I suppose : if they don't exist locally they can't be pushed to the cloud).
I played the deck on the go during the period where the saves are missing, with a bad internet connection.
I don't know what happened, but something went wrong. Either user error - me, or a bug on cloud saves - but I don't think steam would delete local files, or the game failed to write the sav files for some reason, even if the png are there?
Any advise would be appreciated. A big fix if there is one would be good.
Best.
PS : excellent game by the way.