Brazil are always a strong contender for any world cup, they have a very good chance to win gold in Qatar when the tournament starts in November, but there are other strong candidates for gold too, and unfortunately only one country can take the trophy back home. Brazil are ranked the number one country in football now, i don't know if that is good for the players or if it will put some pressure on them as they know that eyes will be on them to deliver based on their rankings.
What I see, as a person who followed all the Brazil matches of qualifiers, all friendly matches and Copa America:
Some months ago I was worried about coach Tite not giving space to young players, like Rodrygo and Vinicius JR from Real Madrid, but after the Champions League, things started to change
Brazil have players to play in any league, with any team, if you need a team only with players under 20 years Brazil can provide easily, just an example, the last Olympics Brazil won, so this is a continuation of the work. Now Brazil have more players from that title, like Richarlison, Matheus Cunha and Antony.
Now Brazil have a mix of young players (but already experienced), and experienced players like Neymar, Thiago Silva and Ederson.
Last cup Brazil are weaker, but now Brazil is strong like any other squad.