Yes, that's true, but in the first match Osasuna somehow managed to score 4 goals against Barcelona and beat them, although in fact this is a rarity, Osasuna often scores few goals, but they took points in matches with Real, Real Sociedad and Athletic Bilbao, so this team knows how to play with strong teams. I also expect Barcelona to be able to beat Osasuna, especially at home, but this may not be an easy victory, Osasuna has many draws, they know how to defend.
Osasuna probably knows how to perform against big teams. Also, Osasuna won the first match against Barcelona by 4-2. The result of this match surprised us all. Despite osasuna's weak attack, the team scored 4 goals against baarcelona's strong defense.
However , I don't see the possibility of the same thing happening again. Barcelona will definitely take revenge for the previous defeat. And I believe that Hansi Flick is preparing his match strategy for this purpose. Barcelona will definitely go to the field with the aim of winning this match by a big margin.