Well whether it pops up or not, if it doesn’t get announced it’s still useless. It just gives me error messages now, and I’m not even sure it pops up because I had my region set to US earlier or because there’s actually something happening.
I guess thats the point. On my girlfriends iPhone who never switched the region of her phone to US there is no + in the upper right corner of the wallet. On my phone which I switched to US region before the + button appears but there is an error message if I click it. My guess is that almost everyone who is interested in Apple Pay switched his/her phone to US once in order to try things out and that's why some have the + and some not.