Even though there was a decline, Osimhen was still able to score 15 goals with Napoli last season. Yes, his scoring ability decreased, but that also happened because the team as a whole was not playing as well as the previous season, so this is not entirely Osimhen's fault in my opinion.
Napoli still insist on setting a high price, even though they have now reduced the price for this player, it is still high. Paris Saint Germain is actually not the only team interested in Osimhen, in the Premier League it is reported that Chelsea are also interested in bringing in this player. Apart from Chelsea, Arsenal is also one of the teams reportedly interested in Osimhen.
I just checked and didn’t find any mention anywhere that PSG would like to buy Osimhen, maybe you confused him with Kvaratskhelia, because PSG want to buy him. But all these are still just rumors, which are now full and in the meantime, PSG remains intrigued, and they still have not strengthened their attack with a forward, although with the departure of Mbappe this is a very necessary step for PSG. Enrique understands this very well, but is in no hurry with new transfers, perhaps they are waiting for the end of the Euro.