I think, Napoli is not a club that often spends a lot of money to bring in players with great quality. Because the fact is, even though at this moment Napoli have been left behind by their great defender. But Napoli have just brought in forwards so far and thus, it seems that Napoli maybe not prioritizing too much to find a replacement for Min jae Kim for the position at center back. But yes, it is not too clear what Napoli will do for the next season as their main players like Osimhen also still in the team. Therefore, it is appropriate for Napoli to look for a great player for the defense position of course, at least to make the team performance more balanced in attack and also for their defense.
For defense (Centre-Back) Napoli still has 3 players, one of which is Amir Rrahmani who can be relied upon to replace Min jae Kim this player consistently improves its performance Napoli brought him in 2020 with a transfer fee of 14 million and now his market value is 25 million maybe this is the reason Napoli did not prioritize finding a replacement for Min jae Kim because they have capable stock. I also see Napoli signing a new striker, Giacomo Raspadori (23 years) was brought in from Sassuolo with a transfer fee of 26 million I suspect that this is Napoli's attempt to anticipate if at any time Victor Osimhen moves and also Napoli's efforts to invest in young players.
Napoli sometimes unpredictable they rarely spend that kind of money on player transfers but we certainly remember when Victor Osimhen was signed they are willing to pay 75 million for this young player meaning that Napoli is not a stingy club they spend the money according to the club's needs. During this period Napoli's best investment was in Kvaratskhelia, brought in with market value of 15 million and has now increased by 6x to 85 million this value can continue to increase because he is still 22 years. I think this is what Napoli has done for Raspadori.