I doubt that Nike customer service told you those dates on that QR tag are specially made only for the EU, it’s very unlikely that they wouldn’t have that information. You probably saw that on reddit, one of the rumors was that pairs with QR tags are fake, which is not true, another rumor is that they are only for pairs in the EU, which is completely untrue. I have seen pairs with the QR tag from the US, the EU, and Australia. If these were actually from the EU then they would have the textile sticker, as required by EU law. That packing slip and order number is from the EU, but these can be easily bought or faked. Nike and their employees do not authenticate sneakers, if they did then there would be no need for places like StockX or Goat.