i doubt if Arsenal was willing to pay that much for Osimhen, they are known to be a team that can’t pay much for players.
Gunners are without a top striker this season, converting Kai Havertz to play in the nine position was good enough for Mikel Arteta but not fully comprehended for the team's pattern of play. Gunners urge to buy more attackers in the frontline. Victor Osimhen would definitely fit into the perfect picture of every elite club, there are passive means of enabling the striker playing for EPL side but Napoli was strictly based on the fee which other parties didn't agree. Arsenal is elite club that are not willing to pay such huge amount for a player, the team's management structure is diverse based on specified amount ought to spend on players.
Under Arteta's command, Arsenal has shown solid strength and as a club that is favored to be a strong candidate for the EPL champion this season and a tough competitor in European competitions. It only takes a little more polish for Arteta to perfect his squad, bringing Osimhen to the Emirates Stadium is the main choice because as you said, Arsenal currently needs a strong striker and that place is suitable for Osimhen. If the plan really happens, I imagine the duet of Osimhen and Kai Havertz in the future, how fierce Arsenal will be at that time. Talking about the price, Arsenal management should try if Arteta really wants this player.
Arsenal is unable to purchase Osimhen due to his contract with Napoli expiring and the fees is very high. And is not performing like before again and that is the main reason the big club don't want to risk there funds to buy such player with that amount. Only Saudi Arabia has the funds to purchase him. Galatasaray will benefit from Osimhen's loan, as they lack a better striker in the club and now that they get Osimhen they will do well and perform great in the ucl and in the league.
Arteta just need to look for another striker because Havertz is not performing like before again his form has reduced and now that they have Sterling, let see if they can perform great when they come back from international break because they need to win the premier league this season they have tried many seasons but they failed and this season is another opportunity for them to achieve the title and if they fail again, I don't think Arsenal can achieve trophies against Arteta any more. they need to get another coach to help because every season Arsenal will perform and when season is getting to and end they will started performing weak game and let Manchester City overtake them in the league table, let see how the season will end this time.