Bayern Munich hopes are certainly on Mane. As a replacement for Lewandoski. But Mane has had a difficult season. Had a good debut, but in some matches Mane performed poorly and even argued with Sane in one team. But Mane jiga is not bad, he can score 12 goals and 6 passes. So I think he just needs some adaptation time. But I don't understand if he will stay or leave. I saw on social media that he was in demand by clubs from Saudi Arab.
Mane wasn't comfortable at all with Bayern Munich at a point he received a fine from them because of that. His performance dropped and he is getting annoyed to keep playing in Bundesliga in my opinion. I read weeks ago that he was thinking about moving out of Germany. I think he wants to get back to England and he might move to Saudi Arabia if they offer to him a good reward.
In the previous season, Mane played very well for the attacking line, he even had several goals with quite a lot of assists, but he was treated quite badly by the team he defended.
There are several English teams after him and this will be a great opportunity for Mane to prove that Bayern Munich have treated him badly so that they will regret what he did for wasting Mane.
After all, several English teams targeting Mane are also big teams.