For some reason, my saved data is missing for Little Nightmares. I dread that I have to start over. Is there any way to recover saved data?
There is no option for us to recover saved data on our own from games unfortunately, because it's all saved on Stadia servers.
I guess your best bet here would be to contact the developer (or maybe the Stadia team) to find out if they're able to help you with the recovery.
Wish you all the best and fingers crossed!