I had this same question on my 2022 F450 Lariat order. It’s actually a long story, but I ordered a SRW F350 in August and it was built delivered and paid for in late November. It actually sat at the dealer for a few weeks while they replaced a gateway hub computer. I took delivery and 48 hours into ownership it had a massive electrical issue that that fried the main computer or gateway hub again. Ultimately this was replaced 3 times along with other electrical components (at the direction of a Ford tech was flown in to diagnose the issue) but after a short time it would cut out again. This truck then sat inoperable in my driveway for 3 weeks over the holidays while Ford and the dealership were figuring out what to do. Needless to say, they had to unwind the purchase and they ordered me a F450, guaranteed the price at time of ordering and also had my PCO and rebates put back in the system.
Getting the F450 scheduled was a completely separate issue but after ordering on 12/07 it was just scheduled for a build week of March 7th. I have remained calm throughout the whole process and I know it wasn’t my dealers fault that Ford sent them a bum truck. My F450 build was moved from a priority 2 to a priority 1 and then it scheduled the next day. Hope this helps.