GK: Literally Joan Garcia or a new starter for god's sake. Tek is Tek and ter Stegen's knee might fall off after all these injuries. Neither are a long-term solution and if there's a very good one available in the market literally in your own city then you need to be ruthless and secure it IMO.
DEF: With Eric Garcia's performances probably a LB, or maybe a versatile FB able to play on both sides? Could Vanderson do it? I don't know. Sell Araujo and consider signing Tah on free transfer. I don't think Tah is a high ceiling signing, but if you're going to sell Araujo then Tah is a similar-ish profile so would make sense to have one such player in the squad.
MF: We're fine here and I don't see any signing that makes much sense either this summer unless you want to bring Partey or someone like that on free transfer which I wouldn't care much for myself, and the club might want to avoid the off the pitch stuff with him anyway. Try to renew Frenkie on decent terms for both sides I guess.
ATT: A LW, I don't know who whether Rashford, Lookman, Nico, Leao, Luis Diaz whatever, there's a new name all the time. Just sign a good one please. Ideally a new starting striker, but that's not happening. As good as Ferran has been, it's not going to be easy when you have to deal with top, taller and physical CBs so a mobile, quick and physical striker would be great, but not happening this summer I think.
Won't be an endless budget so the goal should be to secure top competition/depth as possible in the positions lacking. If the club are able to spend more freely then a striker should obviously be considered as well.