I don't know what will come out of this, it is not going to be easy and looking at how Real Madrid needs a striker, even though they may end up getting him for free next summer, whatever his one year worths, they should be willing to pay for that much. That would really be good, maybe not 300 million, but pay like 100-150 million to get him, they have that kind of money and would be so much better this year too.
I think PSG is exaggerating because after all, as a player, Mbappe also has the right to accept offers if outside parties contact him, especially since everyone knows that Mbappe's only goal is Real Madrid. So PSG should be more open and sincere about their players to be able to get a better future. After all, Mbappe has also been so loyal to PSG over the past few years and when his contract is about to expire it's clear he wants to decide for himself and doesn't want to be held back by PSG.
Source: https://www.goal.com/en-ng/news/back-off-psg-report-real-madrid-fifa-160m-transfer-agreement-kylian-mbappe/bltf07904ac60ac0aeb