In addition to Bayern Munich and Leverkusen, we also cannot miss Frankfurt who is the mediator of the competition between the two teams. Frankfurt will likely appear more consistent considering their schedule is not included in the Champions League. So this season Frankfurt can focus on maximizing their chances in the Bundesliga. Occupying 2nd position with a small difference from Leverkusen requires Frankfurt to be able to create distance.
Frankfurt will be part of the challengers and maybe they cannot be underestimated because like the previous season where Leverkusen was able to provide a very extraordinary surprise for Bayern Munich. Although if you look at Frankfurt it is different from the results obtained by Leverkusen in the previous season and also talking about consistency in the match. If Bayern Munich does not create a slightly greater distance then it is not impossible that Frankfurt will try to catch up on the points and that can still be done when they play more consistently.
Leverkusen was able to provide a surprise by winning the Bundesliga title because they performed consistently and did not experience defeat in 1 full season while Frankfurt was not as consistent as Leverkusen they have experienced 2 defeats so far and the gap with Bayern Munich is already 6 points so it is not easy for Frankfurt to catch up if Bayern Munich performs consistently. I think Frankfurt is difficult to win the title but what they can try is to finish in the top 5 this season and that is also a good enough result for them.