When it takes you to the ford site (which is normal), you will need to sign into your ford account with your username and password you setup when you created the ford account. If you do not have a Ford account you will need to create one. Is this the ford site it takes you to?
https://www.ford.com/buy/manage.html?reservationId=xxxxxxxx
replace xxxxxxxx with your reservation number and type exactly into your web browser
then sign into your ford account and it will show:
I keep checking backdoor link early every week since dealer told me I was scheduled on 3/28/2022. Now, I received an email with a VIN from Ford on 5/13/2022. So I think that is a good sign?!