I also don't expect Kylian Mbappe to move to the Arab Pro League when his career is as good as it is now. Liverpool have the possibility of getting Mbappe's services, but the chances are very low if we look at how Liverpool pay the salaries of their players. Liverpool and PSG might be able to come to an agreement like the wages are shared, but I think that's too bad for PSG.
PSG don't have many options in Mbappe's situation, if they can't extend Mbappe's contract then they have to sell him, loan him, or release him to another team on a free transfer at the end of next season. At the moment several approaches are possible, so as long as it will benefit PSG then they will probably find a deal.
If Kylian Mbappe is loaned to Liverpool or another club it means letting him go for free, what PSG needs to do is extend the contract after that PSG can do anything
After all there is no point in linking Mbappe to Liverpool because right now Liverpool don't have enough money even to bring in new players Liverpool have to wait for Ittihad to pay Fabinho release fee, Liverpool have already spent enough money this season so there is no budget for Mbappe the only way to get a budget is to let one of the players go first.
By the way have you guys noticed Liverpool's last 3 matches? they scored 12 goals in 3 matches 4 goals each in each match which means their attacks are getting more intense, yeah even though it's a pre season match but it's good, some new players can adapt quickly.