If I remember correctly, Mbappe only renewed his contract with PSG once and that was last year when he chose between PSG and Real Madrid. He has already realized his mistake and is now trying to escape from there.
I'm sure Real Madrid will try to get him (although Ancelotti recently once again spoke on the topic that Real have a definitive squad and they don't need reinforcements), but this will clearly not be the amount that PSG wants.
Although have good communication again after Mbappe withdrew from PSG squad in the first match, until right now not any any rumor with Mbappe will renew contract with PSG will over on next season. There are close possibilities with Mbappe move to Real Madrid in this season after Carlo Ancelotti announcing their transfer have been over in this season and there are not any player buy or sell anymore. But I don't think with PSG want Mbappe becoming free agent because have one left opportunity in next transfer window January transfer opening several months later. Sell mbappe or he will be free agent and PSG will loss Mbappe without get fees transfer yet due Mbappe contract will over on next season.
No, Mbappe will either be sold before September 1st or will not be sold at all (leaving as a free agent next summer). No club will buy him in the winter transfer window because he cannot be used in the Champions League (due to tournament regulations that do not allow starting a tournament in one club and continuing in another).