I could definitely tell population-level differences between phenotypes in places like UK vs Poland when I visited (and yes I know Polish immigration to the UK is popular), and I can tell differences between the average population-level look in German-dominated descendant areas in the US vs Italian and Jewish and Irish areas like NYC. I think maybe people are expecting it to be easy to do individual-level predictions which is a lot more of a coin toss, but just telling the broad differences isn't super hard.