I think if a game calls itself a "Metroidvania" and it does not have rpg stats, multiple weapons, multiple skills, experience points, and a lot of fun gear and items to find then it is not deserving of that description.
Instead it is just a "metroidlike"

Games that are mistakingly called Metroidvania
>Hollow Knight
>Blasphemous
>Pseudoregalia
>Axiom Verge
>Ori and the Blind Forest
>Rain World
>Nine Sols
>Animal Well

Games that properly fit Metroidvania
>All Igavanias (SOTN to Bloodstained)
>Afterimage
>Valdis Story
>Astlibra
>Deedlit