Well let's see if he is truly unreal as a super machine goals , so far it's just extraordinary to see him scoring two goals in his premier league debut , i would love to see haaland dominating the whole thing and could really considered as the real tising star , not a flop.
37 games to go and mbappe should move to premier league to create the next rivalry of the decade!
You're right, Haaland still has to prove his performance in the remaining 37 EPL matches. In the next match Manchester City will face Bournemouth and Bournemouth itself is a very weak team IMO. It won't be difficult for Haaland to score at least 1 goal here (if he is played early in the game).
Regarding Mbappe, I don't think he has to move to the EPL to create a rivalry with Haaland, we'll see their rivalry in the UCL soon.