For what it's worth, I too wanted to join the ranks among you beautiful people and ordered a Mini SE Iconic. My order has been accepted and final build sheet signed off on 6/10/22. My dealership (Houston, TX) did offer me to get pre approved and hold my finance rate for 120 days. Not sure if that is common practice, but that is what this dealership was offering. My build search started around 5/20/22 and ultimately made the final decision on the above date. In between 5/20/22 and 6/10/22 several thing on the website changed. When I first looked, I could have ordered every option, then one time there was an alarm credit, then there was no availability on the heated steering wheel. Ultimately when I did go an place the order, the alarm wasn't even showing up as an option or credit, but the heated steering wheel was. For the sake of sparing my sales person, I won't mention their name, but we have been in contact frequently since my order. The last thing that I was told is that they internally had a call this week, and supposedly, Mini had made the decision to give the Iconic package orders more importance. Hence, on 6/10 I was told to expect 4 months for the vehicle to arrive, and on that call with my sales person on 6/16, they said closer to 6 months.
Therefore, I too, am now worried about the incentives from a timing and expiring scenario. YMMV.