PSG's squad may not have any big-name star players. But the bonding between the players in PSG's squad is very strong. So if the players of PSG can continue this kind of performance then there is a possibility of this team performing well in the Champions League as well. Due to the good understanding between the players, the team played well in all three matches in Ligue 1 and managed to win each match by a big margin. PSG got an experienced coach like Luis Enrique. Luis Enrique is also an experienced coach for the Champions League platform. So I think PSG has a great chance to do well in Champions League matches this season.
PSG is still able to play high quality football because they didn't sell most of their key players. They lost Mbappe on free transfer and sold Manuel Ugarte (Manchester United), Hugo Ekitiké (Frankfurt) and Danilo Pereira (Al-Ittihad Club). All other key players were maintained. I guess this is the reason why they are still coordinated, unlike others that are trying to find rhythm due to the introduction of new players. PSG gives priority to the Champions League and I am sure Luis Enrique will be doing all he can to make the club make an impact in the competition. I am not sure that Qatar Sports Investments headed by Nasser Al-Khelaïfi will be patient with Luis if he fails to win the competition this season.
and another reason is because there is no other team in Ligue 1 that can match PSG's performance so that the departure of several players and even Mbappe does not affect anything for the results obtained by PSG in the domestic league.
Maybe later in the Champions League will be the real proof whether PSG can be better without Mbappe or not.
Currently Luis Enrique is building a process with the PSG team and it has not been seen that there has been good development in his second season and also for changes not much has happened for those who are targeting to be able to win the CL title, I think it will be difficult for PSG.