I have seen a speculation like this about Osimhen.
Source: Goal.comCould this really be true?

I mean is there really a chance that we can lose Osimhen in January? Because as far as I know he doesn't have a January clause and he is staying with Galatasaray until the end of the season.
I hope there isn't such option for him. Otherwise it would really be difficult to convince him to stay more than half a season. There will be an option to play in the Premier League on one hand in the end.
Victor Osimhen has the quality to play in any team in the world. Of course, Premier League teams will fight to transfer him. For now, Manchester United is acting with a new vision and will want to bring him to the team. I also thought that he would not leave the team during the mid-season transfer period, but I think there must be a gap in the contract. If Napoli sells the player in January, Galatasaray will be the victim in this case. Of course, there is a fee in the contract. Maybe Galatasaray can be paid a certain amount and have him sent off the team in January. I do not know if this news is true, but if it is true, Galatasaray will be greatly affected by this situation. Right now, the most effective name in the attack, along with Mauro Icardi, was the Nigerian football player.
In financial terms of course galatasaray will not suffer losses if osimhen later leaves for another team, because in osimhen loan contract, galatasaray has a unique clause in which teams buys osimhen is obliged to pay compensation to galatasaray of 6 million euros if osimhen moves before his loan period expires, so this makes it possible for galatasaray to get a little money from osimhen move, but the biggest loss from osimhen departure, of course might interfere with the stability of the team later, because currently osimhen has become a player who has a big contribution and role for galatasaray in competing in the superlig and also the European league, so I think, t this time they also must to immediately find a replacement for osimhen and icardi who are injured, because with osimhen desire to move to a bigger team will make it difficult for galatasaray to keep him in their squad later.