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.
Thomas Tuchel of a truth might pull up a miracle by winning the UEFA Champions League competition next season but has the tactical experience and capacity to make Bayern Munich the European champions.
Having qualified two clubs from two different nations to the final of the competition in two successive years, there's no doubt that Tuchel can win the the European Cup next season with Bayern Munich and that I think will have more chances of happening if Bayern Munich can sign a world class striker this summer transfer window and if possible Harry Kane