You still have one more tracking after it arrives at the railyard. Tracking from the railyard to your dealer - https://www.broncosportforum.com/forum/threads/tracking-your-order-once-off-the-railcar.4823/
I got similar email about a month ago with a 9/5 build date, last week I Chatted with Ford and it was pushed to 9/16. Chatted with Ford yesterday and now its 9/25.