@Halliwell Jones Chester your "guess" is spot on. There is a "stage in production" that the VIN "appears". Just received the following response from IA Customer Service confirming same:
CASE REFERENCE: 89XXX
Hi Mark,
Thank you very much for your patience.
It appears your vehicle has not yet reached that stage in production, but will be making progress over the course of next few weeks.
I will keep an eye on your profile and will continuously check if the VIN will appear. Once I have this information on hand, I will contact you again to notify you of this.
Please do not hesitate to contact us if you need any further assistance.