But they are getting closer to it although it should be kept in mind that they are soon playing away from home against Borussia Dortmund. I think with Dortmund gaining confidence at the moment, that game could be the one where Leverkusen will get their first loss for the season. It is also possible that by then they already won the Bundesliga title.
Even though Dortmund, as we know, is rising and is on a winning streak at the moment, that doesn't mean they can beat Leverkusen, not just because they beat Munich with a landslide score and that doesn't mean they can also do it to Leverkusen, while Leverkusen also beat Munich with a landslide score. , after all we can't measure a team's strength just because they beat the strongest team in the Bundesliga and in the UCL like Munich, but see how they maintain their consistency from the start of the season to the end of this season.
Sometimes someone just judges instantly but looks deeper into the truth of it all.
As you said, if you analyze the results of previous matches, it will not guarantee anything, while Bayern Munich is experiencing uncertainty or a decline in performance which is causing big problems of losing dominance of the Bundesliga title, so it is only natural that Dortmund can beat Bayern Munich.
Leverkusen is different from Bayern Munich in terms of consistency, it is very different and in terms of defensive and attacking strength, Leverkusen is currently much better than Bayern Munich and I would never have thought that Dortmund could easily beat Leverkusen or even a draw could happen.