Real Madrid played well against Osasuna. The problem Real Madrid had in that match is that Real Madrid didn't create good chances against Osasuna, and it made Real Madrid not score plenty of goals against Osasuna. I know it's too early to judge Real Madrid, but they need to create good chances in their next matches if they want to beat their opponents easily, but if they continue with how they played against Osasuna, they will find it difficult to win their matches this season.
I couldn't meet up to watch the game but going through the high light I think Real Madrid played well but they were not able to create good scoring opportunities for themselves so it made them to struggle before Mbappe finally put them ahead from the penalty spot. Real Madrid is not a small team for them not to know what to do I believe they just played their first league game hopefully they understand themselves after watching the match replay and they come back better in their next game.
Real Madrid played well and dominated Osasuna, but since Real Madrid couldn't create good scoring opportunities, Real Madrid found it difficult to score against Osasuna, and if not for the penalty Real Madrid had in the second half, Real Madrid would have played a goalless draw with Osasuna at Santiago Bernabeu. One match isn't enough to decide how a club will perform, so I am looking forward to Real Madrid creating good score opportunities in their upcoming matches in La Liga this season.