PSG look unstoppable, and it should be noted that this transformation happened when they returned Mbappe to the starting lineup.
No doubt they're on fire and Lyon are not helping themselves to at least defend properly to make it hard for PSG. The return of Mbappe to the squad has uplift the team to winning ways but for how long are they going to rely on Mbappe? When is time for him to part ways with the club, what would be their plan? He's good no doubt but I think the coach should sometimes bench him and see how well they'd do without him.
This problem will have to be solved in a year, so PSG have time. In addition, I think that Kolo Muani is the replacement for Mbappe - he has a long-term contract and if he progresses (or at least does not degrade), then PSG will have no problems with attack. Even now, PSG still have Dembele and Gonzalo Ramos. Many clubs could only dream of such a selection of strikers.