@Shelly
The order in how they are being built is likened to a tombola and its how lucky you are to have your number picked regardless of how long ago you ordered or what engine, gearbox, lights, electric tail lift etc. you have ordered.
This applies to both Motability and other leasing companies though it does seem odd that dealers often have new Tiguan’s on offer for immediate delivery and can only think that these are cancelled orders.
Hang in there’