I don't think it matters at all for the championship. Bayern Munich will easily become champions without him. Moreover, the main competitor, Borussia Dortmund, has lost their star player Haaland. If you put that on the scale, Dortmund suffers much more. Bayern also has plenty of time to look for a replacement. The name Ronaldo is mentioned several times, but I don't think it will be him. They still have very good attackers, but one more would be nice.
It is true that Dortmund are weak because they sold their star, but we have to see that even if other teams in the bundesliga are not very strong, they can make bayern win the league with many difficulties, this in my opinion is a great opportunity for others teams make bayern struggle to win the bundesliga. even with healthy mane in bayern i don't see bayern being as strong as in past seasons. we'll see in the next games if i'm wrong