It might be worth a try even if Amazon doesn't have an official field for it. Amazon UK has an "add delivery instructions" button in the address book, intended

It might be worth a try even if Amazon doesn't have an official field for it. Amazon UK has an "add delivery instructions" button in the address book, intended for building codes and suchlike. Failing that, you could try writing "what3words: foo.bar.baz" as your name.