Purchasing a European iPhone 14 Through AT&T Store in The United States

I want to purchase a iPhone 14 Pro with a physical SIM card tray, but I am in the United States, I also have AT&T Next Up and want to upgrade my old phone through that service.

I could easily order an unlocked iPhone from Europe, but I would then lose my benefits of Next Up and have to pay for the rest of my current phone.

So, my question is, could a local AT&T store order a European (or anywhere outside of US) iPhone so that I could have the physical SIM tray, and still be able to use Next Up? Would there be any caveats?

Thanks,
Aaron