I think winning the Chmpanios League is much more important for any team than the Bundesliga but still for a team like Leverkusen when they are having a record in the Bundesliga, that's normal to see them putting much more effort into the Bundesliga matches. On the other hand, we have Bayern Munich, they are also playing in these two tournaments but it seems Bayern Munich is trying harder for the Chmpanios League than Leverkusen.
Bayern Munich are more focused on the Champions League because that is most important to them now and they feel that the Bundesliga is not something they should worry about since they always win it every year. Leverkusen will be more focused on the Bundesliga title because that is what is more important to them. I think it is a game of priority now and each team will go for the most preferred competition for them at this point.
Indeed, for the season after Tuchel was able to recruit high class players, he became more focused on bringing the team to a higher level, such as focusing on the UCL and indeed that was the main goal for Bayern Munich and more precisely, the title in the bundesliga would be easy for Munich to achieve because all it needed was to always get closer on points to Leverkusen and when the match in the UCL can be resolved after that at the end of the season it will easily shift Leverkusen position if it is Bayern Munich intention to also win the title in the bundesliga and we remember last season when Bayern Munich was just below Dortmund in the end of the season was tense and very surprising Bayern Munich was able to overtake Dortmund and finally win the bundesliga title.
even though Munich will not be able to win the title in the bundesliga, the most important thing is that this team can win the title in the UCL because as long as its mainstay player Kane is still in strong condition, Tuchel will easily set whatever strategy he wants because he feels Kane can really be relied on.