I can't really understand the desperate need to buy.
Ederson, Ortega, Carson = no keeper needed
Walker, Lewis, Akanji, Stones, Dias, Ake, Gvardiol = no defenders needed
Rodri, Kovacic, Nunes, DeBruyne, Foden, Bernardo, Grealish, O'Reilly, McAtee, Perrone = no central midfielders needed
Bobb, Doku, Savinho, = no wingers needed
Haaland
The only position, arguably, that we require is a back-up to Haaland. Given we are likely to play a false 9 in his absence, with a front line combination of Bobb, Doku, Savinho, Foden or DeBruyne, I don't see a centre forward of the highest calibre being willing to sit out game after game.
As for Rodri, similar. He isn't replaceable, so you rely on the combination of central midfielders we have.