Yes, even though Mbappe is always relied on by Luis Enrique, Luis Enrique still needs his other subordinates to have abilities like Mbappe so that they don't just rely on him at the club because if one day Mbappe leaves PSG they have to be able to stabilize their performance so they don't experience problems.
This cooperation between the PSG teams seems to be an example for other clubs so that they don't just rely on star players in a club because if something like this happens, it is not impossible that a club will experience a significant decline and be unable to stabilize the condition of the club.
Therefore, Mbappe must really recover quickly and return to the club in order to face the Champions League because currently PSG's opponents are top clubs so it is difficult for PSG to face them if they if you don't have a capable attacker.
Every coach definitely has several mainstay players in the squad and usually they are players who can make a difference in every match even though every player they have is a mainstay in achieving victory every time they play. The other players that Luis Enrique currently has are below Mbappe's skills and that is why Mbappe's presence is considered very important in every match they play, especially when it comes to the Champions League competition.
Luis Enrique also has to show other players as a solution when Mbappe is injured and currently he has several forward players who can be relied on for the matches that will take place in the future, both in Ligeu 1 and the Champions League. Although Mbappe's absence will make their front line less dangerous and Luis Enrique must find a solution to this problem.