There aren't that many U18 comparables for draft season in the NCAA since 2000.
Celebrini: 1.68 PPG-1OA
Wood: .97 PPG-15OA
Toews: .93 PPG-3OA
Werenski: .71 PPG-8OA
Hanifin: .62 PPG-5OA
Potter: .56 PPG-2025 eligible
Poehling: .37 PPG-25OA
Yan Kuznetsov: .32 PPG-50OA
Boumedienne: .29 PPG-2025 eligible
Probably not enough good data to really be too sure of PPG as a good measurement (and there are other reasons to pick players beyond their scoring totals at lower levels), but I would say he's tracking roughly okay based on initial expectations. Probably tracking for somewhere towards the middle of the first round. Maybe he'll go a little lower (late first?) due to being 5'10, but other than the Wood season (and he had big skating issues and hasn't exactly completely kept up that crazy DY pace since) it would seem there's a roughly consistent pattern in there, and one that suggests Potter's somewhere towards the middle of a group that so far hasn't produced a player lower than 50OA of draft eligibles to play their U18 year in the NCAA since 2000.