I would like to call Arsenal a win or draw the result in the first leg. The worst scenario is Arsenal to lose at home game.
Of course Arsenal must be able to take advantage of the status as a host in the 1st leg. At the moment, the statistics of the two teams are not much different, they are equally strong. I think there will be a difficult game. Even if you remember in the last 16 of UCL in 2016/2017 Arsenal lost by a margin of 4 goals at home or in Germany. After that, it seems that they haven't competed for a long time. Arsenal are in good condition, they still continue to compete as potential EPL champions. As for Munich, it seems they have been focused on the UCL cup. So they will work hard to win in the 1st or 2nd leg. They have the provisions to do that.
Bayern Munich is increasingly showing poor performance, giving Arsenal an opportunity to take the lead first. Bayern Munich is far from its ideal performance anymore, the lack of compatibility between the coach and the tactics used means that the Bayern Munich players cannot be themselves on the field. Arsenal really benefits and I'm sure Arteta will prepare a surprise in the first leg. It should be remembered that there is no guarantee that Bayern Munich can do something similar in the past, and people who still use that as a benchmark must be prepared to accept the bitter reality. In the Bundesliga, Bayern Munich have to admit that this season they have been very bad and Leverkusen only needs to win 1 more game to ensure the trophy. Many people now think that Bayern Munich will focus on the UCL, but with conditions like this, they are increasingly doubting whether they are really ready.