Yes, only one point, so it will not be difficult for Bayer to reduce this gap, there are already 7 points between them and Bayern, which will be much more difficult to reduce and so far I think that Bayern will not allow this to happen, because the level of opponents in the Bundesliga allows them to feel comfortable. But Bayer at the beginning of the season lost a lot of points with teams like Werder, Holstein, Bochum, if you want to defend the champion's title, you need to beat such teams.
In my opinion, Leverkusen should bring in new faces in the second half of the season, new strength can at least increase their chances of continuing to approach Bayern Munich's points, because I see Leverkusen's current players look mediocre, especially in defense, so far Xabi has not been able to strengthen that sector. Only a few players can be relied on on the field.
Most of Leverkusen's players still maintain the same players as last season, even Leverkusen has added some new faces to their squad this season so it can't be said that Leverkusen's players this season are ordinary, it is indeed difficult to maintain the same performance as last season and Xabi Alonso has tried his best so that his club continues to achieve good results but it seems that Leverkusen cannot defend the title this season but at least Leverkusen must try to finish in the top 3.