I don't understand why Conte chose to sell Osimhen and asked the club board to bring in Lukaku. Several reports stated that the sale of Osimhen was due to a club agreement and Conte could only agree to it. But apart from these rumors, I think Conte's decision to bring in Lukaku was because Conte had worked with Lukaku and Conte saw that Lukaku was the striker they needed right now. Another reason is probably because Lukaku can be obtained quite easily after Enzo Maresca did not include Lukaku in his game plan for next season so there is a possibility that Lukaku will still be sold.
If we look at the both players we will be able to see that they both have similar problems with their respective clubs which the managers have nothing to do about. The Lukaku issue started from when Thomas Tuchel was a Chelsea coach and due to frustration then Lukaku said Inter Milan had a better atmosphere than Chelsea and then pushed for a loan move they’re after just one season coming to Chelsea. I think that angered the Chelsea and never wanted to have anything to do with Lukaku again. Last season on his return back there was news that Pochettino didn’t want him which I knew was not the manager’s decision but that of the club and right now same circle is happening again with the new manager Enzo.
As for Oshimen his own problem started with the TikTok video saga and since then both of the parties have been bitter to each other and seriously it would have been sensible for Oshimen to have opted for a move last which he had better options than now. His recent outburst with his nation’s federation is another indication of him having a tough time. I think the decision to sell him off now is definitely not Conte’s decision because Oshimen is everything that a conte like striker is. But nonetheless it will be better both clubs (Chelsea and Napoli) use the two players in a single deal and get on with their affairs. Both players have been disrespected way too much by their respective clubs