Currently, Chelsea's performance is not very good and looking from history not after the loss of Drogba and Torres from the squad I don't think there is a single striker who really shines for Chelsea because all strikers have always been a failure when at Chelsea. In addition, looking at the track record of players who have been in Serie A and moved to the EPL sometimes their fate is not very good so this is a good reference for Osimhen to consider his future.
The different tension of the EPL sometimes makes some players with a slow style of play in the previous competition make it difficult to adapt well and not a few star players from Serie A are destroyed in the EPL.
We can see their huge spending 2 seasons Todd became the current club president where in the 20222/23 season they spent more than 600 million on player transfers.
and this season they have spent more than 400 million on transfers made
Source : https://www.transfermarkt.com/chelsea-fc/transfers/verein/631/plus/?saison_id=2023&pos=&detailpos=&w_s=
That is not a small amount but with this much money they don't even develop well because in the end their performance remains stagnant until now.
Indeed, maybe Osimhen can be an answer but on the other hand if in the end this is just trying but there is no change from the management structure for Chelsea officials then I think everything will remain the same because even previously good players will get worse in terms of performance in the end.