This is evident for their pre-season matches even though there is no Lewandowski but their productivity is really good although it still can't be used as a benchmark in my opinion.
At the moment Naglesmann has really made Mane fill in the position left by Lewa and this is still going well with the goal he scored in the friendly but it looks like he has to work hard now.
I guess there is not much you have to do with a player like Mane is to get him integrated into a team , specialy for Bayern Munich.
I would be not surprised if we will see Mane on the Lewandowski position , Gnabry and Mane looks also a good combination for what i have seen.
Well, with Mane's current form, it won't be difficult for him at the moment, especially if he seems quite comfortable with his current team.
Gnarby and Mane are not too bad to try but it looks like for now Naglesmann will still use one striker up front but still be supported by some of their midfielders and second strikers which are the hallmark of Bayern's formation.