After an event finishes, existing attendees can still buy available tickets for replay access, such as an all-access pass, while registrations are closed.
New visitors: closed registrations block the normal ticket checkout. Keep registrations open, or reopen them, if you want to sell passes to new attendees.
Existing attendees: people who completed registration can log in and buy additional available tickets, add-ons or donations from their attendee account or event hub where those options are shown. Ticket availability and access conditions still apply.
Close or reopen registrations
Go to Event Settings > Event Experience > Registration & Checkout > Registrations Open?. Choose Closed to stop new registrations or Open to accept them, then select Save. See Turning Off Registrations for more detail.

