International sport is all about selection. I have never bought this idea of "blooding youngsters" on the international stage to get them up to speed. They are all pros, they train and play week in week out. By all means include them in squads or training camps but you should always play your best players, however old they may be.
Ampadus time will come, he's hugely rated at Chelsea and Conte brought him up three times in a press conference the other day and he wasn't asked about him once.