Regarding the money spent so far, we know PSG for the money they usually spend on their palyer and they usually buy superstar players in each season but this time they made a good amount of money selling the players they had.
PSG spent 300m in this summer for players but they also earned 100m. On the other hand selling players like Messi, Verratti, and Neymar was a good step for them to earn more money.
Although psg did not earn much money from the transfer of Lionel Messi and Verratti, PSG earned a lot of money from the transfer of Neymar. PSG can easily buy a quality player from Europe for the amount of money PSG received as Neymar's transfer fee. PSG will not receive any transfer fee for the transfer of Mbappe, despite receiving transfer fees from those who left the club this season. Mbappe only wants to leave the club as a free agent member, Mbappe without the club as a free agent member means a big loss for PSG because PSG is not able to earn any money from the transfer of Mbappe where there is a lot of money to be made from the transfer of a player like Mbappe. PSG does not want Mbappe to leave, but if Mbappe leaves, then PSG will have to make a new plan and organize the team.