Mbappe should have been sanctioned for bringing such childish behavior to the pitch
Neymar tends to be selfish but why will Mbappe say such outrightly to his face.
The both of them are good they can achieve it all at PSG
I see more selfishness in both of them and nothing childish about Mbappe. If a player wants to show his prowess on the field or his abilities when competing with other teams, I think that's very reasonable, but if it's more of the selfishness of the two of them, it means that they both need additional advice after the game.
In fact, if the two of them can cooperate with each other in a healthy manner, then whatever the team and the two of them want to achieve, I'm sure it will be realized.