Not only is it a team with many young players but also strong ones.
If they were only young, it would be half a victory. The fact that they are strong and young ensures a longevity to a team that if it finds its center of gravity and stability, will surely make sparks fly.
If we are discussing about young players carrying the team, PSG don't have many of them. The best players in the team are above 25 years headed to their early 30s.
The team with the best youngsters is Barcelona, i'm not doing any comparison in performnance but PSG player are not any young, they've been more experienced than the young players in Barcelona, reason why Inter were able to knock them out with experience but couldn't against PSG.
When you talk about young players, almost every team is going the way of young players. You can use Real Madrid as a case study, when Modric begged for extension and was denied because young bloods are needed.
All the front line of Real Madrid are young;
Mbappe,
Vini Junior,
Rodrygo,
Jude Bellingham etc.
Unless you are talking about the team with most teenagers, we can now successfully differentiate.