The truth is, they have to work harder to win the champions league. On the face of it, Mbappe is forced to assume the offensive power alone. In this case, it is bad for PSG that the offensive zone, which weakened without Messi and Neymar, is left alone in Mbappe. They have Dembele next to Mbappe, but they also need a finishing striker like Haaland in the future.
This season is the time for Mbappe and Dembele to work hard on PSG's front line and several other players must also be able to work hard on their respective lines so that PSG can compete better in the group stage in the Champions League and in Ligue 1 such as usually. Because it is too late for PSG to hope for a finishing striker like Haaland in their front line, so PSG can only hope that the existing players can work hard during this season.
Getting a striker like Haaland would be a miracle for PSG anyway. Things are not looking good at PSG at the moment. Especially after losing their important players, Mbappe will not be next year, so they will have to hold on tighter this year. This year may be better for PSG, of course, who will add to their squad during the interim transfer period, all will be shaped accordingly.