Let's not joke, Arsenal will never reach the final stage of the competition, the Champions League this year already knows who will go to the final and it certainly won't be Arsenal, with this I'm not saying that there is an agreement to make a particular team win, but there are several before Arsenal
The tournament hasn't even started, and you are so definitive about who will and who will not make it to the finals? I get it that Arsenal usually fail in this tournament, but it takes just one season for them to turn it around and win the cup. PSG is a very recent example of a club that can fail at a tournament multiple times and finally win. PSG has signed the best player in the world in recent years just to win the Champions League, yet they failed. They were finally able to win it last season.
I don't think Arsenal will win the UCL this season, but you never know. At the beginning of last season, no one would have predicted PSG to win the UCL, especially with the way they performed during the first half of the season. Football is unpredictable, and Arsenal winning the UCL is something that can happen.
The Champions League is always a tough competition, so a completely new team can do well here with good performance. The biggest example of this is probably PSG winning the Champions League title last season. At the beginning of this season, that is, now the discussion about the Champions League was the same discussion that was held at the beginning of last season and many people put their favorite team ahead to win the Champions League title but very few people considered PSG as the favorite. I myself also thought that Real Madrid or Bayern Munich would do well in the Champions League last season but my idea was wrong. PSG surprised everyone by winning one after another and finally reached the Champions League final and defeated Inter Milan by a large margin in the final. If PSG can win the Champions League title, then the teams that we do not consider favorites this season can win the Champions League title.
So we have to wait and see the performance of different teams and then make predictions about a specific team.