If you base it on the App Store account that handles both cases pretty well from Apple’s perspective. US users can buy all the EU phones they want, with a US a

If you base it on the App Store account that handles both cases pretty well from Apple’s perspective. US users can buy all the EU phones they want, with a US account you’re treated like every other American. EU users can buy a phone anywhere and since they have an EU store account they get side loading. Where the phone was purchased from is irrelevant. All that matters is the verified payment address.