In essence, what has happened to PSG in the last few seasons, PSG's competitors are too far away financially in League 1, so that PSG's rivals find it difficult to buy top players at PSG's level. In the end, PSG's rival clubs had to give up their key players to other clubs. This has also been the case with Bayer Munich in the last few seasons, only if Bayern Munich really has a good European mentality then they can compete in the UCL league.
I think it's just a matter of time to see PSG break its dominance in Ligue 1 and PSG, that's why Mbappe won't develop if he continues to be at PSG and can only win the Ligue 1 title compared to other league titles, this season Mbappe must be able to show his best performance in competition against Barcelona who of course have equal strength to them, this is the time for PSG to show their quality to qualify for the next round. at least reach the UCL final this season.