You need to speak to the sales manager or general manager.
Even with a vin/scheduled week, you can still make changes, as I have done this. No guarantee Ford will accept the change, but from my understanding it is not made at the dealer level. This needs to be submitted to the regional rep to coord with ford to make the change. It will take some time to go through. For me it pushed me back one week but the change was made. That’s all that matters. For retail orders you should probably be dealing with the sales manager anyhow. Just my .02$