There are a couple reasons why a particular event may not be visible in the Events List in Check-In.
Check-In displays all events, in the following order: current, future, and past. Events from all accounts a user is a part of are shown, unless archived.
It is also possible your Event Farm login email has not been added to an event. Ask the event organizer to go to the event > Event Settings > Event Users > Add User to Event. After entering information for the Event User, the organizer must select a role from the dropdown menu that appears next to the new user's name and email. The role affects what the user can do with the event.