If it's truly recessed not flat then marpe wouldnt be of much help cuz marpe just expands it sidewards instead of forward which is what he needs so it's just protraction mask there for him but it has a 25% failure rate if your maxilla is really that shitty I think surgery is the bestest option but shit you can get botched for that just massai jump and drink raw milk bro itll turn you into a 6'5 Chad 🤣:ROFLMAO:
Everything like that has side effects/risks dude. Surgery is usually not botched he should get surgery if he's an adult or orthodontic work if he's a teen that's a couple options he has that'll do something if he actually wants to fix shit