From the loss of Robert Lewandowski to the team performance Bayern Munich started to dwindle their performance and it is likely shown at the start of the Bundesliga that Nagelsmann is always insisting for Sadio Mane be a top striker just like Lewandowski which is likely not happening because Sadio Mane wants his original position so Nagelsmann don't have any solution with that at the start of the season for Bundesliga but when he let Sadio Mane in his natural position Bayern Munich have performed well again, and even making incredible dominance wins,
Therefore, Sadio Mane does not need to leave the club, even if Bayern Munich succeeds in signing Harry Kane, because in my opinion, then a murderous bunch of Mane and Kane could be organized, like Mane and Salah in Liverpool. I hope Bayern Munich have enough patience to keep Mane and give him a second chance to show what he is capable of. Trying to make Mane the sole replacement for Lewandowski is, in my humble opinion, a mistake.
That's what Bayern Munich should have done to keep Mane playing in Munich because Sadio Mane has only been at the club for one season and unfortunately it has been interrupted by an injury which has disrupted his performance but he will still probably develop there well and this has also been confirmed by agent of the player that Sadio Mane will remain at Bayern Munich, but changes may occur, and if in the end Bayern Munich chooses to sell Mane because they have got Harry Kane, I think it is only to get fresh funds for the club because they have spent quite a lot of money to bring in the English players.