Yeah, most European leagues will be nearing the end of their transfer window between September 1-2 while in the Saudi Pro League it will close on September 20 meaning players with free agent can still move into this league before September 20. It looks like no more of Europe's top players will move as the deadline approaches, is it possible for the moving process to occur in 2 days while having to go through a contract inspection and medical test?
Transferring players near the close of the transfer window sometimes does happen too, so of course they will do it faster, especially to complete medical tests. Because anyway, with them having completed the medical tests then of course, they will also easily and quickly to take care of the contract of course. But yes, if there is a difference in the time for the closing of this transfer window, then it is clear that clubs in the Saudi Pro League do not have much time left to recruit players who play in Europe. But even so, conversations and or negotiations over interest will certainly continue, and of course they can make the transfers in the next transfer window as well.