>Metroidvania
Metroidvania = Metroid + Castlevania, the later referring to the RPG elements brought by SotN
If it doesn't have RPG elements, it's not a Metroidvania, it's just a Metroid. Metroid is not a Metroidvania, it's a Metroid.
Calling Metroid-likes "Metroidvania" is as incorrect as calling House of the Dead or Parasite Eve "survival horror", but that's also a thing.