Yeah because he didn't have electricity right? They've been inconsistent with that even in the anime... sometimes they didn't bother adding electricity to goku or vegeta in the buu saga when they went ssj2 when in those very scenes in the manga they had electricity but not in the anime if i remember correctly.
Well in my view point he did... how else do you explain Gohan stunning and slightly hurting broly and even breaking out of his hold? When his stronger younger teen counterpart shat himself with no else like goku, vegeta, or trunks even coming close to hurting broly until the obvious a**pull at the end.
Also here's a comparison.
Movie 10 Gohan:
You must be registered for see images
SSJ2 anime gohan
You must be registered for see images
They look exactly the same minus the electricity.
Gohan was a sjj 1 though in the family kamehameha against broly.
bad quality but you can tell since he has 2 strands as opposed to having 1 when he's in ssj 2
You must be registered for see images