Unfortunately for Leverkusen, they can widen the gap with Bayern. They dropped points when they were held to a draw by Dortmund. Bayern will be determined to regain the top spot, but even if that happens, they will still be level on points in the rankings. Leverkusen are not allowed to make any mistakes again because Bayern is in relatively good form compared to the beginning of the season. Leverkusen is hoping this season can overthrow the Bayern empire that has always dominated this tournament. They need to try to make this arena more interesting. That's something Dortmund failed to do last season.
Indeed, in the match against Dortmund they were unlucky, perhaps because Dortmund rested two days longer than Leverkusen, so fatigue was one of the factors that Leverkusen could not win, so in this match they had to draw. Of course, this draw is not good for Leverkusen because they cannot keep their distance from Bayern Munich, which is currently only three points apart and Bayern Munich still has a postponed match. If they win, their points will be equal.
The same point will make the Bundesliga more competitive, but is very vulnerable to the mental health of Leverkusen players. Will they be shaken by Bayer Munich's points? Because so far Bayern Munich's mentality has been tested, even though the competition is getting tougher, Bayern Munich will play more consistently. For Leverkusen, this is the first time they have been in a close position like this, hopefully they can continue to be consistent under the guidance of genius coach Xabi Alanso.