There is no reason for Bayern Munich to sell Harry Kane, Bayern Munich failure to defend the Bundesliga title is not Harry Kane fault because football is a team game, but not an individual game. It should be noted, Harry Kane is the club and Bundesliga top scorer this season, he has scored 35 goals in the Bundesliga since moving from Tottenham. Bayern Munich failure this season is due to not being able to reach Leverkusen's level of play, they very often lose points in matches that should be won easily.
Agree. Even if Bayern management changes the coach, they won't sell Harry Kane. For me, Harry Kane performed very well, they scored many goals for Bayern Munich in every competition. He doesn't only scored many goals in Bundesliga. So, it doesn't make sense if Bayern will sell him because Harry Kane is truly machine goal for Bayern Munich. Unfortunately, Bayern Munich can't get maximum result in this season because they have a problem in defense and midfield line. This makes them to easy to get conceded goals.
Source: https://www.bundesliga.com/en/bundesliga/player/harry-kaneBayern Munich learned a valuable lesson this season after Leverkusen transformed into a strong team in the Bundesliga, even though they have players like Harry Kane who have very high goal-scoring instincts, they cannot win easily if they are not able to maintain their performance. Next season will be a new challenge for Bayern Munich, they have to overhaul their squad if they want to win the title race again.
Sure, Bayern Munich will be more serious to build their squad. They must try to rebuild their defense and midfield line by buying some top players in the next transfer window. Bayern also needs to sign a new coach that will be suitable for Bayern Munich team. This will be their priority because they must expect to dominate Bundesliga again and defeat Leverkusen in the next title race.
Tuchel still has the opportunity to present a trophy for Bayern Munich, they must be able to improve their quality to beat Real Madrid in the UCL. This match will be a big test for Bayern Munich because if they fail in the UCL, then there will be no more prestigious trophies to win this season.
In theory, Bayern still has a chance to win UCL trophy. But I am not really sure about this because they are against Real Madrid which knows well how to win the UCL trophy. In my point of view, Real Madrid looks like to beat Bayern Munich, so the dream of UCL title may be very small to be true for Bayern Munich.