I tried ordering through the Apple store app and the stupid app kept telling me my Apple card billing address was invalid. I then ordered through Apple's website using the same Apple card and it went through. Obviously Apple is having some system issues between their system and Goldman Sachs. At least with me anyways...
Same with me. First tried to add both phones and check out in app, got an error saying that i can only have one "carrier" phone in my bag at a time. So deleted my phone and tried to check out. Kept on getting address errors for apple card. But then i suddenly got an email confirmation for my wife's phone.
So i switched to my computer. Bought my phone (pro blue), checked out, but once again, i had card choosing errors. My default apple pay payment is my apple card, but it was auto-selecting another card. I had to manually select the right card and once again select the correct address. My blue phone's order still is not showing a delivery date.
I ended up placing another order for my wife's phone (pro gold) just in case on the computer.