Maybe the player you mean is Ousmane Dembele not Victor Osimhen, because at this time Viktor Osimhen is playing for Galatasaray in the Turkish league, and he has never played for Barcelona or PSG.
Ohho, Thats my mistake. I mean Dembele, not Osimhen. Osimhen never played for Barcelona. He is now with Galatasaray and previously played for Napoli. I made a mistake, you got it.
And speaking of Ousmane Dembele, indeed compared to his performance when he was still playing for Barcelona, what Dembele displayed in his second season at PSG, he performed very well and became the main force for PSG for now. He is not only good at scoring a goal but he is also quite good at providing an assist. He always contributes in every match he plays with PSG, be it in the form of goals or assists.
The main reason why Dembele is playing well with PSG is because PSG does not have a more experienced striker than Dembele. But when Dembele was with Barcelona, Dembele was the most inexperienced and weak striker. The squad had star players like Messi and Suarez. And they could perform well regularly. That is why Dembele does not get many opportunities. Also, now Dembele is quite experienced. But when he was with Barcelona, Dembele did not have enough experience