Bayern doesn't really care about the league anymore, that's really a boring situation, third place would have been quite bad, but they are not doing that anymore so all they care about this UCL, and to be fair, there is a very strong possibility that if they win this game, they are going to win the title, and while that would be bad to miss out on Bundesliga title winner streak and lose to Leverkusen there, it would end the season on a great note.
Tuchel is known to do that, on a horrible Chelsea season, he managed to beat City and win the UCL title before, so Tuchel could do the same with Bayern as well, feels like not all that complicated. I believe that we are going to see Bayern fight really hard, will not be easy game for Real Madrid at all.
Yes, Tuchel is targeting his team to win the Champions League trophy, so he has really let Bayer Munich's reputation get worse in the Bundesliga this season. Of course he really wants to repeat the success he had at Chelsea at that time. Even though they were only able to score a draw in the first leg, Bavarian's opportunity is still open even though it is very difficult to get it at the Santiago Bernabeu. But the clash between two elite European teams will still be interesting and most people will still bet on Real Madrid.