The case with Argentina is different from that of Portugal. Argentina has an enormous pool of talented players, and already youngsters such as Julián Álvarez, Alexis Mac Allister and Enzo Fernández are performing well at the international level. The case with Portugal is different. They were always a one-man army led by Ronaldo and once he retires he will leave behind a huge vacuum that none of the younger players will be able to fill. They have a few youngsters like João Félix and Rafael Leão. But I have found these players to be very inconsistent.
Portugal have many young talented player but they not brave give them chance get regular position and prefer keep hold on with Cristiano Ronaldo, I think is difference between Portugal and Argentina where not problem give chance for all player and not depend on Lionel Messi only. Many Portugal young talented have quit well performance and playing well with their team like João Félix and Rafael Leão but less minutes playing and Portugal most priority for Cristiano Ronaldo make it difference why Portugal can't get good achievement in several competition from World Cup until EURO.