Of the real options, there is only one and it is known to everyone - Real. This transfer could have taken place last summer and the previous summer, but PSG poured money into everything (as it turned out in vain) and Mbappe lost another two years in the Parisian swamp. Exotic options may include City. Since City still cannot persuade Haaland to extend his contract, there is a theoretical possibility that Real will lure him instead of Mbappe, but then it will be the most profitable and logical for Mbappe to move to City.
I don't know whether Mbappe's decision to extend his contract with PSG was a wise decision or whether he was punishing himself to continue being with a club that has difficulty winning prestigious trophies (aside from local competition trophies). Whether this is a form of loyalty or purely because of money, everything is still gray. Real Madrid's interest in Mbappe has been around for the last few years. Mbappe could have moved there straight away, but in reality he has always extended his contract with PSG.
Regarding Haaland, I think he will stay at Manchester City. He has been at the peak of his performance since starting his career in the EPL, at the peak of which he managed to achieve his first treble winner in his career. With Manchester City he could become the best player in the world by winning the Ballon D'or. Currently he is at the right club and is being looked after by a genius coach, there is no reason for him to move to another club.