Guardiola is a loser in terms of his results in the Champions League - only with the golden generation of Spain he was able to win it. After that, he failed with Bayern one of the strongest in the history (Jup Heykens) and then every year with City on an endless budget.
The fact that they got to Bayern is not surprising - the closer to the final, the higher the likelihood of such meetings and if you want the title, then you must be able to beat such teams.
Personally, I will evaluate the correctness of the decisions of the Bavarian management precisely by this result - if they beat City then OK, I will be happy and satisfied as the second money bag (first is P$G) will be knocked out of the tournament again.
I won't say Guardiola is not successful in champions league football because he has won the Champions league trophy but not with Manchester City and currently in the Champions league he has another chance to make history but against a very tough opponent in Bayern Munich. It will be a test between Guardiola and Thomas Tuchel for who is the better coach.
Two rivals from the premier league who know each other well. I can say that it is more advantageous for Thomas Tuchel because he is a coach who knows Bayern Munich well. Although Guardiola also has Bayern in his past, he has now become a coach that is associated with Manchester City. Tuchel's Bayern could also take the trophy if they knock out Manchester City.