tough to say. Wilder's not really unhittable but neither is Joshua. I'd think Joshua needs to blitz him but it all depends if Joshua was actually setting up that big right tonight or if was just trying to land it. If we believe the narrative that it was precise timing he might manage it but I can't see Wilder letting him try to figure him out for so many rounds. He'll either have to "figure Wilder out fast" or just go all at it in the first rounds. If he loses he loses by waking up on the canvas so he needs to do what he can with the confidence and accept that may be how it ends.
Tonight this fight was basically Ruiz v Joshua 2 meet Jake Paul v Tommy Fury. I'd say he fought timid, saw success with the right, and just tried to land it.