Don't be like that.
I am going to tell you some youth players I watched and won the award.
Cristiano with 17 on a friendly vs Betis from Denilson and Joaquin, scored a screamer. 1 year later vs O' Shea another friendly almost killed him. Same Summer on a Toulon tournament destroyed Argentina on a final they won 3:0. The rest is history.
Lionel Messi, repeat and repeat the same mode again, just look at his first game vs Mourinho Chelsea.
Neymar just compare the things he did in Brazil with the other players around him.
This to say I don't need to be a scout to say the first game I watched from Mbappé was on a under 19 Euro semifinal vs Portugal where France won 3:1 and he scored 2 goals. 7 or 8 months later he was playing at the Ettihad vs City and did exactly the same things.
This just to say what he did yesterday didn't suprised me one bit. I even think with the same age he is better than Cristiano, Henry, probably Neymar, the only one better than him was Nazário with the same age.
Not comparing with Messi, because its a total different type of player. Only injuries will stop him, playing for PSG will not make any difference.