Ah, I guess the lawyer will build the factory to make the head gasket!!
I’m not trying to make light of your situation because it does suck. This place is full of great (not) advice from the conspiracy theorists that will only get you more stressed out and won’t help. Unless you want to try and get the truck bought back, contacting the BBB, a lawyer, Trump, whoever will not magically produce a part that is on backorder. It’s all a waiting game at this point. I had to wait months for a transmission to be manufactured for my Cobalt SS years ago that was backordered. There is a process that takes time when a part goes on backorder, which could be caused by all kinds of reasons that can’t be foreseen.