I completely know the feeling of helplessness and worry. I went through what you're going through just two weeks ago. These scannings do little to let customers know where their package is, by the way. I had the good fortune of having a friend involved who has worked in the government remote viewing program, and she assured me the chicks were in the normal process of moving to place to place and all was well. And that's how it turned out eventually.
I can only offer a little hope and encouragement. I talked to all sorts of postal employees during my quest to locate my chicks. Most were very sensitive to baby chick needs, and one supervisor, after making the long trek out to the loading docks to search for my chicks, pointed out a table they have set up in back with a heat lamp for baby chicks that are over-nighting. They do and will open the crate and administer to the chicks if needed. It's very rare that you get a stupid and ignorant or uncaring worker ignoring the chicks' frantic peeping.
Bottom line, though, if worse comes to worst, the hatchery will replace and reship your order, and withing 48 hours, depending on policy, if any chicks sicken or die, they will be replaced or credit refunded.