If you see the progress of the news about Mbappe then you already have the answer, that is, PSG will sell Mbappe in this transfer window because it has become clear after PSG did not include Mbappe in the names of players who will take part in the pre-season tour. I'm sure Mbappe will go to Real Madrid in this transfer window because for now Mbappe situation with PSG is heating up after he was dropped by the team for a pre-season match.
For that we will see many surprises from Mbappe transfer drama in this transfer window. In fact, we only know that Real Madrid is the leading team to get Mbappe, but maybe that won't happen if other teams are able to make an earlier bid for PSG in recruiting Mbappe. I think that Bayern Munich will join the hunt for Mbappe in this transfer window because they are struggling to get Harry Kane.
Mbappe at PSG has become a core player, and it is certain that PSG will not make it easy to own PSG, so the PSG manager is trying to make an offer that is quite crazy and very difficult for Real Madrid or other clubs to have Mbappe.In this way, the hope is that no one will take Mbappe, so that PSG still has Mbappe as one of the best players at PSG.