I haven't seen any credible news about PSG selling Mbappe. Messi has left PSG. Rumors are being heard that PSG is also interested in selling Neymar. If PSG management sells Mbappe now, the PSG team will be very weak next season. It seems unlikely that PSG will sell the three main players in the squad at the same time. But if PSG wanted to form a completely new team, they could do so.
It’s not an easy situation with Mbappe, Real Madrid wants to get him as a free agent, and they even agreed this with Mbappe, and promised him a bonus of 100 million for such a transfer to the team. At the same time, if Mbappe finishes this season at PSG, he will receive 60 million a contract for the season and 90 million loyalty bonuses, but the PSG bosses clearly do not like this because they feel cheated in this case, because they will not receive anything for Mbappe, so they would like to sell him this summer, and if this happens, he will not will receive payment with bonuses neither from PSG nor from Real Madrid, so this situation does not suit him either...