If you look at the list of players above, they’re from all over the field, nearly every single unit... except there’s no or virtually no offensive lineman.
This is how recruiting rankings always go: offensive lineman are ranked much lower than their peers, even if they are better players.
This is why recruiting class ranking have a big disconnect with how good each class actually is. Teams like Wiscy and Iowa load up on line recruits, specifically OL. Their rank drops even though they actually have great recruits. Then we laugh at their rankings... but then they crush us because they recruited the most important unit in football well.