He is a very big talent. Like a number of players with reputations, many more seasoned than Embolo, he has looked nervous on the big stage so far this tournament. The likes of Pogba, Griezmann, Kane, Gomes - none have looked as at ease as they do at club level, a club level that is often against better players.
I would not be surprised to see Rashford play like he's never seen a football before if he's sent on in a scenario that matters. Thankfully, we would know the truth, but I'd imagine fans from elsewhere would react just as many are reacting about Embolo.
He is a proper talent. I remember seeing him in the CL at just 17 and he was dancing around players and being a real threat. Europe's biggest clubs have been tracking for a long time.