Getting Konrad Leimer on a free transfer is a fortune for Bayern because Bayern's midfield is quite weak, but Bayern should be more focused on getting a striker to replace Lewandowski because it is certain that if they haven't found a replacement for Lewandowski, it will be difficult for Bayern to fight in the UCL next season.
If I'm not mistaken Leimer has been one of Bayern Munich's targets for quite a while and it looks like he will feel comfortable at Bayern Munich because his future is definitely guaranteed here to be able to win the Bundesliga title. While with Leipzig in season 22/23 he has played 29 times then contributed 4 goals and 1 assist in all competitions.
I think for the central midfield position it's not bad as long as he can help maintain stability on the field and bring his team to good results. Leimer is also still 26 years old and his future is still quite long, especially if he can display significant performance it is likely that he will get an additional contract duration or a salary increase with Bayern Munich.