All these achievements happened to Leverkusen last season, but it is very unlikely that Leverkusen will repeat this again next season, although it is not impossible for Leverkusen to achieve it again with Xabi Alonso. Moreover, next season Bayer Munich itself will be handled by a new coach who generally will definitely need a little time in terms of adaptation and other things. So Leverkusen could put this to good use again in order to repeat what they achieved last season in the Bundesliga by never losing until the end of the season.
Maybe it won't be possible for Leverkusen to become a strong, unbeatable team again even if there is a chance, but in terms of performance I think they already have it. They could be a strong team next season, but it won't be easy to maintain their unbeaten record again, because with Bayern Munich having got a new coach, they certainly won't let Leverkusen dominate the Bundesliga again. It would be great if Leverkusen could return to being an unbeatable team next season, but of course it will be difficult because apart from that they have to divide their focus with the Champions League.
with the time needed by Bayern Munich, this is certainly an opportunity for Leverkusen. If Bayern Munich cannot recover quickly then it will be a good opportunity for Leverkusen to dominate the Bundesliga again. because with a new coach of course it takes time to adapt, and whether the results will be better or not, what is clear is that Bayern Munich will do their best next season by not allowing Leverkusen to dominate again. Apart from that, Leverkusen is now a tough challenge for Bayern Munich, even though they have recovered, it might still be difficult to keep up with Leverkusen.