Well Mane is a offensive winger and not a central striker and now that Robert Lewandowski is gone Bayern does not really have a world class central striker anymore. I know that Choupo-Moting is a great player and he is also showing great performances so far in this season but it is also a fact that he is already 33 years old already and only 1 central striker for a club like Bayern Munich is just not enough in my opinion. Harry Kane is also 29 years old already and i would guess that he would cost around 100 M€, because he still has one year of contract left after this season. So this would be a really expensive transfer for Bayern. We will see if they will pay that much money.
Real is going for Mbappe so i doubt they will go for Kane too, Real already has a lot of debts after all.