From what is happening with the Victor Osimhen deal Napoli don't seem to be interested in exchanging Victor Osimhen for any player they just want a club that will pay the money in full so that they can get profit from his deal while they go for any play or their choice and right now Galatasaray seems to be the only team that is completely ready to accept the conditions attached to his deal since he has already done 1 year loan deal with them. Liverpool will benefit if they should go for Victor Osimhen but they haven't made their intentions know yesterday so Galatasaray is still the preferred choice for now.
Rumors surrounding Victor Osimhen's future seem complicated, and several teams interested in him are also reluctant to sign him due to Napoli's high asking price.
The swap deal for Nunez is beneficial for both parties, but Napoli is demanding a full buyout clause for any interested team interested in Victor Osimhen.
Galatasaray may be able to smooth the negotiations, but Victor Osimhen's intentions to play for a much bigger club are also a concern.
If Liverpool are interested in acquiring Victor Osimhen, I think a swap deal without Nunez is also possible, as they have proven themselves in the current transfer market by bringing in such expensive players.