Osimhen is a difficult one to know what is really going on. Napoli wanted him to sign a new contract to increase his release clause to 130m Euros, so gave him huge wages assuming a big European club would come in for him. They then had some fallings out as he was treated pretty badly in the media by his own club. The transfer market also changed and European clubs no longer wanted to spend big money and become more efficient, so it was only Saudi who could afford these big sums. In my opinion that's why the links to Saudi were so strong last summer, as Napoli were caught holding the bag and wanted to sell him to the highest bidder. After the Chelsea deal fell through, he ended up at Galatasaray which no one saw coming and has performed very well. I think he will try to hold out for a Premier League or top European club this summer rather than go to Saudi, but that's just my hunch.
Would love him at United!