if someone often watches the Champions League and Ligue 1 then it can seem very easy to judge because they used to have the best strikers in the team but there wasn't much they could do in the Champions League. In the Champions League, the strongest team may not necessarily be able to win, especially if PSG only relies on Mbappe individually because the Champions League is quite different from any other league, apart from experience it also requires collective player maturity.
For me, PSG is not the favorite team in the Champions League because there are many things they need to evaluate. Maybe we need to wait a few seasons so that Luis Enrique can bring PSG into a strong team and that depends on how management gives him the opportunity to manage PSG.
Drastically difference level between Ligue 1 and UEFA Champion League matches, PSG easily manage top standings position in Ligue 1 but face difficult how to qualify next round in Champion League and this season got lucky with goals difference from AC Milan after having the same points. Agree with your opinion about PSG is not favorite team in Champion League regarding their performance in Ligue 1 with not high compete fail for winning all domestic league matches.
But get little easy opponent team on 16 round against Real Sociedad, looking Sociedad performance in domestic league no quit well although can manage top standings group in Champion League.