After bursting onto the scene at Manchester United, the youngster has needed a little more patience when it comes to the international stage. Alejandro Garnacho marked his first start in a Red Devils shirt with a brilliantly taken goal against Real Sociedad back in 2022; rifling home a finish from a Cristiano Ronaldo assist in what increasingly feels like a passing-of-the-baton moment between one former Manchester United superstar and the next one. On Argentina duty, however, the twinkle-toed winger has had to wait to really make his mark. After couple of eye-catching cameo appearances off the…