I agree with what you said that Nagelsmann must immediately find the best position to mane
from what I noticed when Mane was still at Liverpool, he is a striker who is more active in providing assists than scoring goals, that's what makes him unable to replace Lewandowski as a pure striker
Muller used to provide assists to Lewandowski and that made the Bayern forward line very sharp but now Muller is forced to provide assists to Mane, and I see that it doesn't fit
They should be bolder to try something new, although this is not the time to experiment but it is worth a try to break the deadlock they are facing now, before it is too late. I still believe that they in the Bundesliga can still get to the top of the table again. But something different for the Champions League, that's what I emphasize.