Yes, Neymar is still getting his recovery healthy, I believe that Neymar would have performed well when he's present in the match despite his injury I still trust him, moreover we still have many key players that can deliver beyond our expectations, person like Vinicius and he actually did very on that match, person like Raphian and Igor Thiago, thses players can still move Brazil forward
Neymar would have been a great addition to the squad even if not in terms of pay but in terms of experience. He would have been a good motivation to them and also a good leader because that is what they really lack in the team right now. I believe in term of play Neymar would have actually been a liability to them, he probably would focus more on his personal satisfaction of dribbling and having fun instead of actually focusing on pushing the team to win.
They have a great squad that could perform well if they can actually work together and improve their performance as a team. Raphina is a good player and we are yet to see what he can offer so I have the believe that they will improve with or without Neymar.
It seems this isn't about his experience anymore, as most of the players called up are quality players who already understand what they need to do to lead the team to victory. Neymar isn't the type of player who needs to show his quality, As everyone knows he a top player, But his injury will seriously jeopardize his ability to perform professionally and contribute to the team.
Therefore, I hope Ancelotti can assess the team performance. If the team is striving to win, he should field players who can perform Optimally and contribute to the team. We see how Neymar's recovery progresses. If he doesn't recover quickly, He just be on the squad list, But he won't be able to play due to his ongoing injury.
Again as footballer who is coming to play for his country the clubs has already known how they do play their matches and also how they do play the match to win the opposite country before already they go back their respective club side.
Most of those players that is from specific country immediately there is world Cup you would see their country presenting them so that they would win the World Cup.