A member of staff might allow a passenger to move further up the queue if they’re lucky but unfortunately, this won’t always be the case.
Passengers could also try contacting their airline. If a lot of the plane’s passengers are stuck in the queue, the airline may choose to delay the flight.
The airline may also be able to move a passenger onto another flight and remove checked luggage from the plane.
However, the airline isn’t obligated to put a passenger on another flight if they’ve missed it due to queues.