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.
Contrarily that may not be the case, it is very possible Bayern Munich isn't trying to esteem the champions league much more than the bundesliga but they just have so much experience already with the bundesliga such that they can always come back and still find their way back to the top even though this season is actually taking a different shape tho.
Leverkusen remains the only big rival Bayern Munich still have in the bundesliga this season and their next fixture is much more far ahead of them such that they still have some time to getting ready for that game so for now they will be channelling some good attention to the champions league where they have got lesser experience and lesser chances of winning the league title by the end of the season. In the bundesliga, Bayern Munich will definitely finish tops and possibly win the league if they have got any opportunity so Leverkusen needs to keep making sure the margin gets even bigger.