I only see Attendee list from Event, but the Sign-in/out is specific to the Day or the Session.
For now, we have multiple-day multiple-session Events. This works for my school. They register for the entire class and attend all Sessions/Days in order to get a Certificate.
We may not want to take this on right now, but eventually, Attendees will need to be able to register for individual Sessions. There may be two Sessions running consecutively or concurrently. Attendees could choose and then sign-in/out of individual Sessions/Days. In this case the Certificate would list the Sessions attended.