I think the odds also have an impact on betting on Leverkusen. As a surprise, I think there are people trying to make money by betting on Leverkusen. If Bayern does not win the championship this year, everyone will be very surprised because they have a championship hegemony that has existed for years. They have the power to continue this this year too.
At the moment, I have almost no doubt that Bayern will be able to become champions again. It is already obvious that the fight for the championship will take place between Bayern and Bayer and there remains a two-point gap between them, which suggests that Bayern can regain the lead in any round. It seems to me that once Bayern can do this, it will be more difficult for Bayer to stick with Bayern. Very soon Bayer will have to play with Dortmund, let's see if they can beat them.
I have the same thoughts as you that this season the competition is only between Bayern Munich and Bayer Leverkusen, and when Leverkusen is caught off guard so that Bayern Munich can take over the first place then it will be difficult for Xabi Alonso's squad to bring down their competitors, and only when facing a big match there is a chance Bayer Leverkusen lost a wide open position as they will face Dortmund in a few weeks.
As the home team, Bayer Leverkusen will be more favored but Dortmund, who are currently outside the Champions League zone, will try to improve their ranking or at least keep the point difference with the teams above them small so that the opportunity is maintained because Stuttgart will still possibly go down and Dortmund is ready to come back in the top four.