If you look at the quality of the players in Argentina and Brazil, these two teams could actually dominate the Copa America this season. Because Argentina also has talented young players, the Argentine side will definitely not rely too much on Leo even though Messi himself is played as the main player in the Argentine squad. However, the Brazilian players also have more young players who are quite dangerous so it will be quite interesting when these two countries face each other in the Copa America match in certain rounds.
I dont think Brazil with their current performance will be able to dominate the Copa America, Brazil performance in the FIFA WCQL last year was very bad, from 6 matches they could only win 2 times and lose 3 times.
Brazil also just appointed their new coach in January this year, 5 months perhaps not enough to bring Brazil performance back to the top.
While Argentina, after becoming World Cup Champions, have won 13 of their last 14 matches in the FIFA WCQL and international friendlies, Argentina will clearly dominate the Copa America this year, not Brazil.
That is a fact that cannot be denied, because Brazil is now experiencing a slight setback for the Copa America trophy this time. Argentina is a strong candidate to win, they have better and more even squad depth in every line, but Brazil is still one of the teams to be taken into account. That's right, the journey of the two teams in the World Cup qualifying rounds was very different, no one expected Brazil to perform that badly. Losing Neymar to injury may be one factor, and changes in management within the Brazilian football federation are also another reason. Ancelotti was linked with becoming manager, before they finally appointed Dorival Junior.
On the other hand, Brazil is in group D with Colombia, Paraguay and Costa Rica in the Copa America, I think they will be able to qualify for the next round with the status of group winners. Overall, Argentina is the favorite to win the Copa America, Messi presence has a big influence on their mentality. Dorival Junior needs hard work to bring Brazil to the top of its performance, encouraging its players to unleash their full potential, Vinicius, Rodrygo and Endrick could be the hope this time.