Bayern Munich have to face a team that necessarily is strong to enter the final game. A witnessed teams like Inter and Chelsea which were less favourite in the previous years that went through the final eliminating stronger opponents and made it to the finals.
Bayern Munich will face eventually Manchester City or Real Madrid or Inter or another good team later after winning against Lazio which are in bad forms. I think Bayern Munich shouldn't wish to face an easy team, they have to eliminate every rival they face to win the title. This year, many teams dropped in performance, including them, so they might pick this opportunity once they improve themselves.
To be sure, I don't want to speculate too far for Bayern Munich. basically, let's just wait until Bayern Munich visits Lazio's headquarters. or, in the second leg at the Allianz Arena. but theoretically, it looks like Bayern can beat Lazio in the knockout rounds. whether it's an away match or a home match, on paper Bayern are much more favored than their opposing team, their chances of qualifying for the next round also have a fairly high probability. after that, which team will be their opponent. if it's Madrid or City, these two teams are tough obstacles for Bayern Munich even though Tuchel actually has quite competitive players. moreover, in January it is certain that Bayern will be hunting for several players to make their team stronger as a whole. however, City and Madrid remain very tough competitors. if lucky, Bayern can meet other teams first. thus, their chances of advancing to the next phase are quite wide open. even so, Bayern Munich is quite ready to face Manchester City and Real Madrid. however, to overthrow these two teams. not a very easy job for Tuchel. Likewise with City, the team they are playing against is not too tough at their class level. likewise with Real Madrid, who will visit RB Leipzig's headquarters in the first leg. however, the results may be different from what we think. apart from that, there are several clubs that will also fight as hard as possible even though they are not nominated as the strongest competitors. so all the teams competing in the round of 16 will try to do their best work. there is no other choice but to wait for this knockout round to be held.