Depends on age (and a bit on development) at our nursery, and the 'diary' appears after they've been signed out for the day, rather that bit by bit over the day. In general for under 3s, it has sign in, what/how much they ate, when/how long they slept, nappy changes/toilet/accidents, and sign out. What they did during the day is verbal at handover, and medication is a separate signed log (not including suncream!).
Over 3s, quite a bit less detail, and toilet trips tend to drop off once a child is reliably clean/dry, and 'didn't sleep' also tends to disappear once a child generally doesn't nap, even if under 3.
As-and-when photos appear occasionally, but the main observations and focus weeks are still done hardcopy (which is lovely, as the children can look through their books once they are old enough, and we get to keep them when they leave).