I think not every bid will be announced officially. And big teams may think Osimhen price will be too expensive after Napoli wins the scudetto. However, I believe there will be some official bids for Osimhen before this transfer window is over. Osimhen is one of the most valuable strikers in the world, he is a top striker with good potential future. I even think that Osimhen level is not so different with Mbappe, he is skillful and experienced enough in every top competition in the world. I think Osimhen will be very suitable to play in Real Madrid or Bayern Munich. He is s typical of a pure striker who has an extraordinary of shoot accuracy. It is what a top team wants from a striker, a real machine goal. 
Viktor Osimhen is a coveted target for many top clubs, but I think that Napoli is not going to sell him yet in this transfer window and therefore has put such a price on the striker about 150-180 million euros. More clarity may come in the winter transfer window and whether the player will extend his contract, which expires in 2025 for another 2 years. So far, everything seems to rest on the amount of the salary increase. And also whether the player will be able to maintain such performance in the future.