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.
Lazio's performance in Serie A is also not very good. In fact, they lost to Bologna recently. It's just that Bayern also has an unstable performance in the Bundesliga. Because Bayern also lost to Bochum 2 weeks ago in the Bundesliga. And this will only make Leverkusen even more comfortable in the Bundesliga and it looks like it is certain that they will win the title in the Bundesliga this season. And this could indeed make Bayern more motivated to focus on the UCL. And I think that in the second leg, Bayern can win and turn things around and in the end I hope that Bayern progresses to the next stage. Because honestly I expect Kane to have good achievements in his career.