and Sadio Mane can not handle the pressure that Lewandowski has established,
Mane and Lewandowski are two completely different footballers, i don't think Sadio Mane is a striker, yeah he can play in the number 9 position, but he feels more comfortable coming from the flanks like he did in Liverpool, Lewandoski is a number 9, a player that was created to score goals, just look at his stats, there is no comparison between Lewandowski and Sadio Mane when it comes to scoring goals, so it is not about Mane not being able to handle any pressure, you shouldn't expect him to recreate Lewandowski's numbers in front of goal, he has his other stronger areas.
Yes, Mane is in a different position with Lewandowski, but now it looks like Mane is replacing Lewandowski in front of Bayern so many expect Mane to do the same as Lewandowski by scoring lots of goals.
Mane is not a Target Men, he is very strong on the wings like he did when he was with Liverpool so for Bayern's poor form which was not as productive as last season I don't think it was because of Mane. and maybe Bayern should think of another solution for this.