About Spider-Man Omniverse story,
You think Deku only reads modern superhero media and the not old ones. Like he'll read something about a recent comic event involving Kitty Pryde and only to get reminded about Kitty saying Slurs in Uncanny X-Men comics in the 80s.
Also if Superboy Prime got added to the story, he would be mad that he's not the story cause he has more knowledge including beyond super hero genre,
He could out-fanboy Deku, even Japanese media, like he'll know about Kamen Rider and more super robot & mecha genre stuff. Cause he's a bigger fan boy then deku.