Bayern Munich should focus their attention on the UEFA Champions League because Bayern Leverkusen would not allow them to win the Bundesliga title this season. With the recent struggles of Bayern Munich, it will be hard for them to win the UEFA Champions League trophy this season.
I think that's what Tuchel has to do to pressure his team to focus more on the UCL because it's difficult to catch up on the points difference, Munich has to give up this season's Bundesliga title to Leverkusen because so far they have dominated the Bundesliga for quite a long time and Leverkusen has broken that dominance and Munich must accept their failure in the domestic league and focus more on the UCL where they will face Arsenal which in my opinion is not too difficult for them to get rid of Arsenal.
I think Munich will have a smooth road if they beat Arsenal in the UCL later, especially as another strongest club like Madrid will face Manchester City, of course one of the strongest teams eliminated. Munich will face a club that is not too difficult, at least they have to prepare themselves against Arsenal later, even if it doesn't It looks difficult for them because Munich has a lot of experience in the UCL. Of course they have to be able to get rid of Arsenal before advancing to the next round. Tuchel must be able to break the strategy of Arteta and his team in the next meeting in the quarter-finals.