Dry diaper after night time long stretch?

Carrie • Mama of 3

My 8 week old has been getting in the habit of her first long stretch of sleep being from 8pm to about 12-1am. However I noticed her diaper has been dry at 12am the past few nights. When I google it i read that this could be a sign of dehydration but it also just seems like it could be because she’s in deep deep sleep for that stretch? Has anyone else experienced something similar?