With the departure of Lewandoski, many expect Bayern bring in a proper no. 9. Although Mane isn’t a like-for-like option but I am convinced that he is going to score many goals and almost replace Lewandoski. He might be deployed as a speedy target man, something similar to Jamie Vardy at Leicester City and Kylian Mbappé at PSG. Mane has proven that he can score from all over the pitch, with his decisiveness in front of goal from wherever he operates. So I strongly believe that he can excel as a no. 9, and there is little or no doubt that he'd be great at the job in Lewandoski’s absence.
Bayern Munich are interested in bringing Harry Kane for his place but I don't expect this deal to happen. There isn't any reason for Harry Kane to leave his team now and I don't have an expectation from the team to let him go too. Mbappe isn't leaving the team anytime soon. Jamie Vardy is a good striker really but I don't think that Bayern Munich will think of signing him either. But maybe he could still be one of the last alternatives. They would chase better strikers first.
@Velvet78, what @CryptocurencyKing meant about Vardy and Mbappe was as a player parable by being a target position in the game, not Bayern Munich's intention to sign him. Lol! After all, which team will sign Mbappe lol, he has even got everything at PSG, so don't expect Mbappe to leave PSG easily. Because even the king of the Champions League Real Madrid can still be rejected by Mbappe, especially other teams whose achievements in the Champions League are not as good as Real Madrid. As for Kane, it's just a plan, the deal won't happen now but Bayern Munich will continue to monitor it.