Sure, it will be not easy to convince Liverpool. Van Dijk is the mainstay defender of Liverpool. I see no chance that Van Dijk to move to Saudi league in this season. He may move to Saudi league, but seems not for the next season. There is still no other defenders in Liverpool who can replace the role of Van Dijk this time. It won't be a wise decision if Liverpool lets him moving to Saudi league. If he has the intention to play in Saudi, I guess it should be in 2025 (contract expire).
Likewise with Virgil Van Djik's problem, I think the answer is quite clear. Because if he chooses a big salary and money, then he will definitely move to Saudi Arabia. But if for example he chooses a career, then he will definitely stay at Liverpool. So now Virgil Van Dijk seems to prefer to stay at Liverpool, because of course he is still really needed there. Apart from that, it doesn't seem like Liverpool will let Virgil Van Dijk go to any club at this time.
So, with this, Virgil Van Dijk certainly failed to be recruited by a team from Saudi Arabia.
Apart from that, if we compare Ronaldo and Virgil Van Dijk, it is certain that in terms of popularity or fame, the two are also different and in terms of age they are also clearly far apart. So if you think that Virgil Van Dijk will be easier to tempt with money than Ronaldo, I don't think that's right. Because we need to know that Virgil Van Dijk is still 32 years old, so he can definitely still be sought after by big clubs in Europe. Meanwhile, Ronaldo is quite old, apart from that when he left Manchester United, if I'm not mistaken at that time, none of the big teams from Europe were interested in signing him. That's why when an offer came from Al Nasr he accepted it. So basically the situation that befell Ronaldo and Virgil Van Dijk is clearly different.