It's not strange that most European teams are composed of players in their late 20s and early 30s. That is the period when a player should be in his top form. It's rare that a player in his early 20s becomes an irreplaceable part of the team. Young players need older, more experienced players in the team to look up to.
I agree with the argument that most of the players will be in their late 20s or 30s. But in the previous editions, most of the European teams had good players in their early 20s. However this time (Qatar 2022) only a few of the European teams had such players. Some of the teams do have players who are 20 or 21 years old, but they are no match for the more experienced players. Players of the calibre of Erling Håland or Ronaldo of 2006 are extremely rare nowadays. Let's take the example of Germany. They have a few - Karim Adeyemi, Youssoufa Moukoko and Lukas Nmecha. But these players are not even regulars in the playing XI. Most of the attack is being done by Müller, Gnabry and Gündoğan.
We can bet on the youth, and it's a good strategy, but let's just look at the example of Spain in Qatar, all the youngsters led, almost a Barcelona, and what did they win? nothing, go away, why? because the youngsters do not have experience, they do not know how to deal with certain eventualities that arise on the field of play, it is partly the fault of Luis Enrique who did not know how to choose a team and left the best without playing, this is because I did it due to a lack of maturity despite the fact that he is already old, so I would not bet on having a team of young people alone, that is why it is better that they focus on the championships of the sub-20 category, it is better, the professional is something else.
We need a mix of younger and more experienced players. Spain lost out, because players such as Sergio Busquets and Álvaro Morata didn't performed. To their credit, they have one of the most talented younger player in the UEFA (Ferran Torres).