Dude, you must not have watched the match Bayern Munich lost to Saarbrücken. When it comes to Bundesliga matches, losing is possible for every team. Even if you are Bayern, you can lose a match in this league. Even though it is unlikely, this possibility exists and it would not be right to say for sure. As they mentioned, Kane is an extraordinary striker. After Lewandowski, they finally closed this gap.
The match with Saarbrücken, it was a cup match, not a Bundesliga match, Kane spent the entire match on the bench, so either the cup is not important to Tuchel, since the main striker did not enter the field, or there was an underestimation of the opponent, but in any case this is not the best example. This is Bayern's first defeat of the season (after the defeat to Leipzig in the Super Cup), so I don't see any unexpected results from Bayern.