My response?
There's others on here who had the same misfortune as you, injector failure on the drive home. I'm not sure what circumstances created this issue exactly, but I'm short this part cannot handle the higher pressure of the hybrid system.
Did someone forget to swap stock when the line switched over from ICE to hybrid? Did the person who sourced the parts not notice the difference in specs? Did the supplier make the mistake? The fact that same engine in both versions uses different parts open the door to someone making a mistake.
Does this mistake make the car a piece of crap? Does it change the styling, the ride, the tech, the quietness, or fine balance of performance vs MPG?
Lincoln responded as quickly as could be expected. After deliveries started in Match, the issue was noted, investigated, and new parts were made available to dealers within 3 months.
What did your dealer do about it? Nothing, it seems. They sold you a vehicle that should have had the fix applied. Sure, there's a chance it wouldn't fail. Some drove thousands of miles without an issue. But regardless, your dealer either knew or should have known a fix was available to them at no cost. But they sold you a ticking bomb. And now weeks afterward, are still fiddling with the car. My guess is there was engine damage but the dealer is either unable to adequately diagnose the extent of the failure or is somehow reluctant to repair it.
TLDR; Several people in here have been in your circumstances and the dealer acted quickly and appropriately. Your dealer hasn't.