Bayern Munich built its squad to be successful in the Champions League. They are already champions in their local league and there are very few teams that can challenge them. This year, they are performing better in matches and reflecting team harmony on the field.
Leverkusen is performing well at the moment, but I don't think they have a chance against Bayern. Other teams like Leverkusen also need to improve their performance. When they play quality football in the league, this reflects positively on the Champions League and the teams play matches more comfortably.
Bayern Munich always improves their squad from season to season, they don't seem to be letting other teams compete with them. But Bavarians also have to be aware that several teams in the Bundesliga are also starting to look to become serious contenders. Not only Borussia Dortmund has always been a strong challenger, but in the past two seasons Bayern Leverkusen have also shown their seriousness, even though they have always not been the favorites, but they will try to undermine Bayern Munich's hegemony.