I'm not going to say that we expect to see a miracle from Thomas Tuchel and his payers in the next season but the fact about ith coach is mostly about the experience he got in the champions league which can be usually for Bayern Munich which is the main reason for them to hire this coach.
The UEFA Champions League is an extremely difficult competition in which the best four teams from each European league compete for the campaign championship. Bayern Munich is a challenging contender for the league title; they frequently lose a game. Perhaps during Julian Nagelsmann's administration at the Allianz Arena, the squad functioned effectively, but after bringing in Thomas Tuchel, the club began performing terribly. In his first season as Bayern Munich manager, Thomas Tuchel won the Bundesliga despite the club's terrible performance.
It is difficult for Bayern Munich to compete in the Champions League if the chemistry between players and coaches has not been formed. We have seen how Bayern Munich performed last season under the leadership of Thomas Tuchel, Bayern were eliminated from the Champions League and almost lost the Bundesliga trophy if Dortmund did not drop points in the last game. This competition is attended by the best teams in their respective leagues, teams that are able to maintain their performance consistently will go further, while teams that are unable to maintain their performance will be eliminated faster.
This season the competition in the Champions League is livelier and more challenging, the Premier League sends 4 of its best representatives, one of whom is the defending champion. Inter Milan who was defeated by Manchester City last season, has added to its strength in order to maintain the chances of getting back into the finals, Real Madrid has also made reshuffles in several positions in order to improve the quality of its squad. Tuchel who handles Bayern Munich, which is the best team in the Bundesliga, must be able to maintain the team's appearance so that it is always consistent in order to achieve the success that the previous coach has achieved.