Kylian Mbappe has been frozen out of the PSG first-team and will not play until his contract runs out next summer; Mbappe felt PSG would be signing Robert Lewandowski and Bernardo Silva when he signed his current deal last year; Mbappe rejected a £258m move to Al-Hilal
But also note, Madrid are in a massive amount of debt. I can’t remember the name, but the previous King liked to write-off their debt and so a certain way of life was established in Spain. Times change and they no longer have that debt being written off every so often, however they kept spending more than they were making and eventually accrued just shy of 1 billion debt. This is one of the reasons they pushed for the Super League, because if the Financial Fair Play rules were ever applied properly, they’d be chucked out of everything.
Anyway long story short, Madrid and Mbappé thought he could join them this summer, but PSG want more than they anticipated and Madrid are unwilling to offload talent to make it happen. Now he can either go to Saudi Arabia or Manchester City and he prefers to wait the extra year.