Yeah, this time of year, long haul shipping can get hot so easily.
MY LFS ordered a melanurus for me last week. It came in the morning, but I could not get there until evening. He floated it the whole day, unopened.
When I got there, it was a big fish (which I asked for) and the bag was filled with fish poo. Like, a lot. He gave me a few milliliters of Amquel and said to dump them in the moment I opened the bag to drip acclimate. Once I opened the bag, the fish laid on its side - a behavior I have seen before but don't really like. The amquel went in and dripped for 30mins mostly him laying on his side. But now he is fine.
I guess my point is, if your fish are to be shipped, consider the intransit weather, and keep a small bottle of Amquel to knock down the accumulated ammonia.
I hope your girl fish made it.