Leverkusen has in my opinion a vital 4 points ahead Bayern and this points might make the difference and decide the champions of Bundesliga this season. I also feel like Leverkusen is playing the best football in Bundesliga and without Xavi Alonso none of this would have been possible.
For Bayern , I think it's way more important to win UCL than Bundesliga as they have been winning it for so many consecutive years so that's why I don't expect them to actually push harder in Bundesliga games vs UCL games.

Although for example Bayern Munich put a high focus on the Champion League but still, the Bundesliga is its top priority. Because anyway, if Bayern Munich does not prioritize the Bundesliga then yes, at least Bayern Munich will not keep trying hard to overtake Bayer Leverkusen. Therefore, I personally remain convinced that there is no good reason for Bayern Munich to ignore the Bundesliga title.
Also, even if for example Bayern Munich focus on the Champions League but yes, it is very clear that no matter how much the team focuses on the Champions League, they will still find it difficult to get a trophy there or in the Champions League. So, in anticipation of failure in the Champions League then ya, of course the domestic league trophy will be a priority so Bayern Munich will still be looking to take over first place in the Bundesliga standings this season.
Bayern Munich are not actually 4 points behind they are essentially 1 point behind because they have played 1 match less than Leverkusen. But they got themselves a win and this is what matters for Leverkusen now. Leverkusen with this victory are now 26 games undefeated and the only undefeated in Europe's top leagues.
But only 16 matches have been played, and it is too early to say by just seeing Leverkusen winning match, they are going to be the Champions of Bundesliga. So I am going to disagree with @boltz . There are still 18 more matches left, and If I had to say which game would decide the champions of Bundesliga, I would say that would be the match between Bayern Munich and Bayer Leverkusen in February of 2024.