I already have my confirmation email from Ford and my dealership haven't seemed to have any problems getting allocations, unless you count when Ford cancelled the entire 2021 backlog not yet built, due to parts issues.
The following was included in the email from Ford:
Congratulations on ordering your all‑new Mustang Mach 1 Fastback! Your order has been placed with Ford Motor Company on your behalf by your dealership.
Your vehicle order is one of the early orders for the 2022 Mustang Mach 1, and because we are building this vehicle just for you, we wanted to share a bit more on our production process as it may impact your delivery time. As part of the quality assurance process at Ford Motor Company, customer orders are only built when all quality checks have been met. This process may lead to longer wait time for your vehicle to be built, but is designed to help ensure your satisfaction. Throughout the production process, we will keep you updated on the status of your order. You will receive email notifications when you vehicle is:
Scheduled for Production - all necessary parts are secured, and your order has been placed on the production schedule.
Built - your vehicle has been built, and we will let you know of the estimated arrival date at your dealership.
Shipped - your vehicle has been shipped, is on its way to your dealership, and we'll include the latest estimated arrival date.