Every Shop order is collected in person — but when the pickup countdown starts depends on when the attendee bought:
Pre-orders (bought before the event starts) have no pickup clock yet. The item is simply held for the buyer, who collects it at the merch table during the event. Their order screen reads "Pick up at the merch table during the event."
At-event purchases (bought once the event has started) start a pickup clock immediately. The buyer sees a live countdown — "Pick up within 23h 45m" — and needs to collect before it runs out.