They have full confidence in Kompany. Xabi did such things in his first season that now teams expect high things from every future coach. What Xabi did will remain a legend. They are the only teams in the history of the Bundesliga to finish the season undefeated. Although this may seem easy, it is a very difficult record. They finished the season ahead of Bayern and became champions. I'm sure Bayern is already making plans for next year.
As long as Xabi Alonso is still at Bayer Leverkusen, there will be many surprises presented by his players and the aim is to win again next season which will soon come. Bayer Leverkusen already knows a strategy that is very suitable for achieving victory easily. So far, many big teams such as Bayern Munich and others are not at their best and Bayer Leverkusen must make good use of this opportunity to win again.
Xabi Alonso has indeed proven that and since he became coach of Leverkusen quite a lot of progress has been seen so it is also possible that these positive things will continue to increase in the next season, but a team like Bayern Munich cannot be underestimated either, they are the rulers of the Bundesliga and during the season Then Leverkusen decided that it was dominant, so Bayern would do a lot to win it back.
Regarding the many doubts regarding Bayern's decision to recruit Vincent Kompany as their new coach, I don't think it should be an exaggeration because it is not impossible for Vincent Kompany to show the quality that Xabi Alonso showed with Leverkusen.