It's probably a group of people who have booked a private vip tour. They are very expensive but they have had them for awhile now since Disney World reopened. It's not a mystery when a large group that doesn't look handicapped go through the fast pass line.in the park I’ve seen plenty of people using the fastpass lines, and while occasionally it’s someone in a Wheelchair and their family, much more often it’s large groups with no ECV or wheelchair among them. How did they manage that?