I also think they can defend their championship in the French league, but when it comes to the Champions League, the probability may be lower. Because when you go to the eliminations outside of the group stage, every team can get surprising results. This year, the fight between Barcelona and Inter was the simplest example of this. While everyone expected Barcelona to win easily, Inter eliminated them. They made it to the final and played very badly against Paris Saint-Germain in the final. I don't know if Barcelona could have won the cup if they had made it to the final, but football is such a game, that's what I want to say.
Even if PSG wins the Champions League this season, it will be very difficult for PSG to retain this title next season. Some of the teams that we considered as favorites at the beginning of last season did not do well this season, but PSG won the Champions League title. Now, if Real Madrid, Manchester City and other strong teams return to the competition well next season, then it will be difficult for PSG to qualify for the semi-finals. I would like PSG to strengthen their team even more and recruit some important players to the club so that this French league team can compete well with Real Madrid and other teams if they perform well next season.
PSG is a strong team. Since they have been champions this season, they will try to improve their position next season, but reaching the final may be more challenging for them. Since they played well this season, which is why they entered the final and became champions, they will have to do better next season. I think this club will probably spend more money this season on their players and recruit good players so that their team becomes stronger. Next season, stronger teams including Barcelona, Real Madrid, Manchester City, and Liverpool will compete with these teams, which is difficult for PSG to succeed in the competition. However, for the next season, every team recruits good players in their club, and those who can form a strong team can expect good things for the next season. Since PSG has performed well this season, they have won the trophy in the Champions League, so they will plan to strengthen their team.