The news of the misunderstanding that occurred was clarified directly by Osimhen on his social media account, that the accusation was not true, and Osimhen called for mutual respect and support for unity. I think the response is quite wise, but that doesn't mean ruling out the possibility of leaving in January.
I also feel that it was a bit misunderstanding but I think it just caught up at a wrong time souring the relationship between him and the team. It's something that will still stay despite how much you try to come up with solution or how quickly you solve it. I think January is a bit too early but I think there is a possibility of Osmihen leaving Napoli in future and that could be anytime around in next summer transfer window or near the contract end.