Their dominance is quite good in this match even though the finishing problem still cannot be resolved but looking at what Flick has done it looks like this will be a good thing for Barcelona.
Flick tries to implement a solid midfield and makes a breakthrough with Raphinha's position which is usually always used as a winger but now he is used as a second striker which slightly changes Barcelona's formation style which I think is quite good.
Btw I don't see Dani Olmo in the squad they are currently bringing, is he still not registered or is he still unable to join Barcelona for the first match?
Dani Olmo's out of the squad means he is still not in the good form. We know Dani Olmo is a good player and he is young too, which means Dani Olmo can play in Barcelona for years and he can be a good investment for this team considering his age and his situation but still Dani Olmo is not in the good form and other than his own situation it seems Dani Olmo's contract is not registered yet because of the financial situation of Barcelona.
This can be a problem for this team but when they hired Dani Olmo they were expecting to have the teams improved by using this player.