While the transfer window is still OPEN Saudi clubs continue to target the players they want, if you compare with the European League it is clearly different, especially with the Premier League I think it is a different class.
New news - Mitrović will soon move from Fulham to Al Hilal just waiting for the green light, this is news again for football lovers.
If Neymar refuses a proposal from an Arab club then there will be no more coming of the same proposal, European clubs are also not much interest except for other leagues besides Europe, in essence Neymar will get big money during a two-year contract, PSG is benefited.
That's right, the Saudi Arabian league will not be the same as the leagues in Europe. However, the initial aim of bringing in European stars was to increase interest in football in Saudi Arabia and to attract tourists, CMIIW. This is the focus of the Saudi Arabian government, apart from building a league that is more competitive and showing the world if Saudi clubs have a lot of "money".

Neymar gets a lot of benefits from his new club and it will not be obtained if he stays in Europe.
Manchini followed to Saudi Arabia and will earn a high salary as coach of the Saudi Arabia national team. I can't imagine if Indonesia meet Arab Saudi now

That is the situation for now, but I think this could definitely result in a competition between Europe and Saudi Arabia on a much larger scale. Saudi Arabia is already competing for players like Mbappe and it is not only there, it is also in Europe already. Manchester City and PSG are both owned by investors from the Middle East and this could have consequences later on, too.
When you consider the competition of the Saudi League and Real Madrid both bidding for Mbappe, it is somehow a declaration of "war", although I don't like to use that word as it carries to much bad reality and suffering. But from a competitive perspective, the Saudi League has made clear that there are no taboos and Real Madrid knows that this leads to Mbappe asking for more money as more lucrative alternatives exist.