it makes sense if Tuchel tries to replace his goalkeeper with another more experienced player like De Gea but to be honest I actually dont see a big problem with Sven Ulreich as far as guarding Bayern Munich goal, hes not that careful, he just sometimes experiences carelessness and this is normal because all players will experiencing the same thing.
from several cases, I think a little that the reason Tuchel did not glance at De Gea seems to be because Tuchel thought that De Gea would not renew his contract at Man United because his performance had declined, so Tuchel doubted this and chose Sven Ulreich as his mainstay goalkeeper.
Maybe because De Gea's age is no longer young, it is also an influence that Tuchel doesn't want him.
But actually, in my opinion, Bayern currently really needs a goalkeeper who has good qualities, indeed so far Sven Ulreich's performance has not had any problems, but if it is in a big match on the European stage, I hope that Sven Ulreich will be able to show his best performance, after all, Sven Ulreich is also very old, he is now 35 years old and therefore in my opinion Baern really need to pay attention to the goalkeeper position in their team.
And Manuel Neuer, who suffered an injury, is already old, so if he recovers later it is not certain that Manuel Neuer will be able to return to his top performance, Manuel Neuer is now 37 years old.