Not sure if this is helpful or not but I created a contact using the below instructions that shows how to enter the railcar #.
https://www.bronco6g.com/forum/threads/rail-car-location-tracking.79073/
Ford chat can give you the railcar #. You can then use that railcar # to track by calling the # for CSX.
https://www.bronco6g.com/forum/threads/here-are-the-bronco-build-tracking-links.22795/
Did you get an email from Ford when your order was scheduled for production? There should be a track my order button on it which will populate your order # and VIN.
The blend date is the date the body meets the chassis. So when you look at the tracker does it show in production?
https://shop.ford.com/vehicleordertracking
Are you using the online tracker? What was your blend date from your window sticker?
https://www.bronco6g.com/forum/threads/here-are-the-bronco-build-tracking-links.22795/