Lazio will only aim to draw the match in the second leg. The team will not be able to win the away match against Bayern Munich. Because Lazio knows very well that it is very difficult to win against Bayern Munich. And they were very lucky to win the home match. Lazio will be tactical in the second leg. And will play a completely defensive strategy. It will be very difficult for Bayern Munich's players to break down Lazio's defence.
In my opinion, choosing a defensive strategy against an attacking team is a very bad strategy, but on the other hand, Lazio has no other choice, and they can just hope that they can not concede a single goal from Bayern in two matches, it sounds doubtful, but they need to proceed somehow from the existing situation.
You are right, It is very risky to play only defensive strategy against the attacking team. But Lazio have no other option. Lazio is not a strong team. They were very lucky to win the first leg match. If luck wasn't on Lazio's side, they wouldn't have won against Bayern Munich. Their overall performance was not good either.

From these statistics it is easy to understand that Munich's performance was better than Lazio's. Munich's attacking players missed several easy chances. Otherwise, Lazio could not have won the match
And whatever the situation in the team, even if this is true and the players thus showed Tuchel that he does not decide everything, it seems to me that in the match with Leipzig the situation changed and in the return match with Lazio, Bayern will show a completely different game. Just look at Bayern's stats, how the team generally plays, how many shots on target they average per game, and how many they did against Lazio. If Lazio can at least draw in Munich it will be a very big sensation.
We have seen many times in the past on the Champions League platform that Bayern Munich and Real Madrid teams have made a great comeback in the second leg after poor performances in the first leg. We expect Bayern Munich to make a comeback this season as well. Because with Bayern Munich in the Champions League, the Champions League will become more competitive. This group is very strong. Munich is behind by only 1 goal. Hopefully the boys from Munich will not disappoint us in the second leg match. I especially want to see a great performance from Harry Kane.