He's definitely got a textbook FAS face but the time Clint got on the subreddit a few years back, he shot the idea down as laughable. "
Lora" (Josh's mother) is allegedly a teetotaler and hyper-religious. Worth mentioning that this was like 4-5 years ago and Homedad Clint was answering questions in good faith. My hipshot armchair diagnosis would be FAS too but that's all it is. I've watched Josh for years but he's been in front of a camera. I've never met him, talked to him in a natural setting and I don't have a medical degree. People love to play doctor and shit on Clint and Josh for false-claiming autism or aspergers but they undoubtedly have a far better insight than any of us given that they've both actually spoken to the doctors that ran diagnostics on a young Cobes. Even if those diagnoses were incorrect, they're based on things more substantial than his youtube channel. I didn't dig too much but I did find
this article cited on wiki which found a broad philtrum to be a physical attribute associated with autism.
This one on autism facial characteristics shows a considerable overlap with facial features of FAS and autism.
So in short, Josh probably doesn't have FAS and it goes against established and verified lore from Papa Clint himself.