Simple fix for Steam below. The saves are not store at a Larian site, either via Steam for cloud or locally on your system
- Right-click the game in your library and select Properties.
- Look for the Launch Options field at the bottom of the General tab.
- Add "--skip-launcher" and close the properties window.
- Launch the game as normal.
Need it for my cross saves between different platforms, I would say the majority of player-base uses it and needs it
Note sure about cross saving as I only game for PC so have had no need.