I switched to an "Inventory" LFP car on August 27. The VIN was immediately in my account and delivery window was September 1-7. But, starting September 2, the delivery window started moving backward one day at a time. I emailed my sales advisor who told me this was due to a software update. Then silence. Yesterday the delivery window update to September 8-11 and likely would have gone to September 9-12 today.
This morning, I stopped at my local store, where I would be taking delivery. They told me that with the LFP vehicles, the system will not automatically schedule a delivery - a person needs to do it (and my sales advisor was away from the office). So the local store set my delivery for this weekend. He also told me to wait to pay and sign the agreements until the morning of delivery.