With an aggregate of 0-1, of course Bayern Munich fate is very much at stake in Leg 2. Playing at home is indeed an advantage, but considering that Tuchel problems are getting more and more complicated by the day. To be honest, Tuchel is not always wrong, sometimes his players make mistakes and are unable to play solidly. With the pressure of having to win totally, I think Lazio will try everything they can to win. With the situation being unstable for both coaches, players and Bayern Munich officials, perhaps we will lose them in the UCL this season to advance to the top 8.
It is not impossible that initially Bayern Munich was made a strong candidate to win the UCL trophy but with the problem of consecutive poor performance it was doubtful that they would qualify.
I think Tuchel is more resigned to this match, because of the issue that next season he will leave Munich. Munich is a team of mega stars, of course not all coaches have the ability to handle each of these stars.
Even though the second leg has the advantage of playing at home, there is always a factor where team cohesion can be a big problem. At the very least, Tuchel has to let Munich qualify to save Munich's face.
On the other hand, Lazio will definitely take advantage of this momentum to qualify for the next round, because this target is definitely a dream that they may not be able to achieve so far.