No chance for Saudi to sign Osimhen. He has rejected Saudi's offer so many times, and i hope they know their position. The latest news is also suggesting how Osimhen is in talk with Manchester United. If i were him and have MU or Saudi as my choices. That's obvious i will choose MU.
Although Manchester United is shite now, but far better instead of going to the finished player league such as Saudi. He can try his luck by joining in MU, and hopefully, he gets other choices beside MU and Saudi,
Osimhen may think it is too early to join Saudi league. He may play until 30 years old in Europe, then he may consider to move to Saudi league. I think it is good decision because Saudi league is a quite competitive competition if he wants prestigious trophies. Osimhen should be better to wait for the opportunity to join big teams in Europe.
I don't think joining Man United is a good decision. There should be many other better teams to make an offer. If he wants to play in EPL, Arsenal or Liverpool will be better options. These teams also have no great strikers, they may be interested in Osimhen to strengthen their squad.