Probably PSG will win the French League title, that is about it. They are out of the French Cup already, I think they will beat Real Madrid but then they will face the top contenders and that is as far as they will go in UEFA CL.
I have heard rumors that they will sign Zidane and Cristiano Ronaldo for next year, that might keep Mbappe there, or maybe they buy Halland. In any case I don't see Pochettino with them next season.