Monaco's scoring productivity so far has been really impressive. They have nearly a 3-goal average a game in the league now. They don't have any problems on scoring goals maybe but they can do their defending better than this. They have conceded 11 goals so far. This can give them some headache later on.
Besides Monaco should improve their performance for big games as well. They lost to Nice home. They won against Marseille maybe but it was a really tough one. They had to make a comeback to win the game. In a month they have a PSG game as well.
With every advantage there must be a disadvantage, I don't think there's a problem if they have the highest frequency of conceding goals in the top 3 of the Ligue 1 standings. Don't just focus on the number of goals conceded, we also have to look at the difference between goals scored and conceded, so far AS Monaco has scored the same as PSG has.
Seeing what's happening in the current standings reminds me of the 2016/17 Ligue 1 season, when AS Monaco emerged as Ligue 1 champions (Mbappe was also still there at that time).