@coruro What you have been told has been Motability policy for as long as I have known (not just for VW but for ALL Motability cars). The car must show on the Motability system and have a live order number for the specific model, otherwise you cannot get the car – full stop.
What @catdog1121 has been told is a first as far as I can tell, and whilst I wish him/her well and sincerely hope that they get their much wanted GTD, I remain a tad sceptical, unless they have logged on to their Motability account and can see that Motability have authorised the car for them. If they have, they are home and dry. If they haven’t, it matters not that the dealer has ordered the car, as that is an entirely different process to Motability Operations agreeing to buy the car and lease it to the customer.
As I say, I sincerely hope that it happens, as it gives hope to countless others that when a car disappears off the Motability website all may not be lost and there may still be a chance of ordering the car as, unless someone can advise me differently, this has never been possible before with any manufacturer through Motability.