Italy crashed out in the FIFA World Cup play-offs to North Macedonia, failing to make Qatar 2022 after missing out on the tournament in Russia four years earlier.
That capped a turbulent period in Italian football after winning Euro 2020, with many questioning Serie A coaches for allowing younger domestic players the chance to develop.
Mancini responded by promising more opportunities for youthful players with Italy, after the 'Finalissima' defeat to Argentina at Wembley Stadium at the start of June's international schedule.
Davide Frattesi, Federico Gatti and Gianluca Scamacca were among that emerging crop to feature in the Nations League campaign, with Italy drawing two games and winning the other.
That has left the Azzurri top of League A Group 3, which includes Germany, England and Hungary, ahead of Tuesday's clash with Hansi Flick's side.
Coach Mancini revealed he is learning a lot as he looks ahead to the future.
"I saw some guys who can have a great future," he said. "The level in the national team is very high. I think the boys need to have the chance to play.
"The first time they made me play was Radice, 1981, in the first team. It wasn't Serie A, it was a New Year's tournament.
"At the first ball they gave me, I lifted my foot and the ball passed, I did not touch it. For a young person, it is not easy, you have to have confidence and let them play even without optimal performance.
"It can be an important thing, it is possible to get to know them more closely. Seeing those guys for three days gave us the opportunity to understand who could be more ready."
While Mancini has started to utilise younger players, he remains unsure how Lorenzo Insigne will progress playing in MLS for Toronto FC.
"He will depend on how he will be and what will happen there. He has given so much to us, he is a great player, it depends on what happens in MLS," he added.