The possibility of Bayern Munich winning the Bundesliga trophy is very small so the Champions League will be more motivation for them to go further or even become champions.
If you look at the opportunities in the second leg, I think Bayern Munich has quite a big chance, they are only 1 goal behind Lazio and the second leg will be played at their home, of course the percentage for Bayern Munich to qualify is very large.
However, currently what is a bit of a concern is the performance of Bayern Munich's players which is quite poor with all the internal problems that this team is experiencing.
Bayern must beat Lazio at home, despite difficult times, the difference between the teams is very big. Lazio can try to play well defensively, but it will be difficult against Bayern, although they managed it at home.
The Bayern headquarters are very optimistic, they are confident that they will be able to reach the next round of the Champions League playoffs. There are injured players, but the main ones are probably Gnabry and Coman, otherwise everything is fine. If Tuchel doesn’t start changing something in the usual lineup model again, then Bayern shouldn’t have any problems.