It would be convenient to have a daily list of visitors and mark everyone who came. What is the best way to do this?

Open the Today visits table. It already has filtering that hides reservations of the customers who already has visited you.

Click the reservation status button to set the arrival and departure of the customer. The "Pending" status changes to "Checked in", and when you click again — to "Checked out". When you change the status to "Checked out", the row disappears automatically due to filtering.