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.