While Chelsea has made a strong start, it's important to remember that any score is possible in the Champions League. I believe Real Madrid and Barcelona are still much stronger than Chelsea. Chelsea will also face a difficult task in the Premier League, as they will be facing strong opponents like Liverpool, Arsenal, and Manchester City. They will be a key team in the Champions League, but I don't think they are the favorites.
Real Madrid, Barcelona, Bayern Munich, PSG, and Liverpool appear to have a better chance than Chelsea, but their strength is certainly something to be reckoned with. At any rate, Enzo Maresca has a good enough squad depth that allows them to beat any team. Chelsea is also quite experienced in the Champions League, therefore they cannot be underestimated.
Indeed, the competition in the Premier League is very competitive this season, and it's more realistic for Chelsea to prioritize winning these trophies to mark their revival. So far, Chelsea have started their journey well in the Premier League, and perhaps they will also be able to perform consistently when playing in the Champions League. Chelsea success in defeating PSG in the Club World Cup tells everyone that they have the potential to create a surprise.