Mikel Arteta will probably face strong pressure because they also have to continue to perform well in the English Premier League. If they make the wrong strategy they will fail in these two competitions and that will certainly be very disappointing because last season they failed in the English Premier League as well as in European competitions even though It's not the Champions League, but I still doubt Arsenal will be in this competition and my prediction is that they won't make it to the semifinals.
I am very doubtful in terms of head to head because Bayern Munich is too strong for Arsenal, is it possible that Mikel Arteta will give resistance to Bayern Munich, with the tactics he has because Arsenal is not that strong to face Bayern Munich, it is likely that he will have difficulties when playing at home Bayern Munich, we know that the Allianz Arena is a scary home for the clubs that play there, so it is not surprising that every club will experience defeat there.
Arsenal's previous Champions League encounter with Bayern Munich didn't end well. But this time, it's a different Arsenal. We should leave the past behind and focus on the opportunities presented by manager Arteta. While Arsenal fans might have their doubts, playing against Bayern Munich at home is a tough challenge. Arsenal is in good form and can beat any team, but as you've said Bayern is also formidable, especially at the Allianz Arena.
The match against Bayern will be a real test for Arsenal and Arteta, yes, it is time for Arsenal to believe in their own abilities. With the right focus and determination, they must be sure they can compete with Bayer Munich today.
The most important thing for Arsenal right now is to be able to focus on 2 tight competitions, because in the EFL they are at the top, if they make mistakes it is not impossible that this season Arsenal will fail to win the EFL again, as well as the UCL after not qualifying for 14 years. Top 8, and this season is proof that Arsenal can compete again in the Champions League competition.