-snip-
Ten points are too big difference and if we also take into account the domination of Leverkusen in Bundesliga, this season in domestic league is already completed for Bayern Munich. Completed in term that they are no longer be able to compete for the league title with Leverkusen. With pride of a biggest and most successful club in Germany and Bundesliga, Bayern Munich will not let themselves losing many matches in coming months but to win Bundesliga, they have no chance.
Maybe it's true, Bayern Munich will not damage their own reputation with more defeats in the remainder of this season even though they will almost certainly fail to win the title. Leverkusen leads the standings with a gap of 10 points which seems big for Bayern Muncen to compete with, but Munich will certainly do their best not to lose many more points in the remainder of the season.
-snip-
Champions League will be their last hope and at least they still have chance there. Beating Lazio and have quarter finals, that looks not a bad scenario for Bayern Munich. When coming to quarter finals, no reason to stop them fighting for semi finals and the final match. Now they will have to fully focus on a match with Lazio as it is their very last chance to avoid a failed season.
Currently, the Champions League is Bayern Munich's main target in my opinion. They don't really expect to win the title in the Bundesliga, but forcing themselves to do well in the Champions League is the most important thing to do. Tuchel is obliged to do and think about the best strategy to qualify for the quarter-finals, but if he fails in the last 16 then I don't think Bayern Munich needs to give him time to stay until the end of the season.
Lazio is a team that should never be underestimated and they are basically a team that performs well in defense. Bayern Munich's attack line is clearly very good, but they are not strong enough in defense which can ultimately make them fail in the end.