Elden ring is quite literally an action-adventure game with guided non-linearity.
You must be registered to see the links
There are tons of items required for exploration and progression into certain areas, especially to complete the game. There are flashing little lights that tell you where to go as well as a multitude of dialogue for when the flashing little lights aren't enough. By your definition, Elden Ring (and most Fromsoft games following the same format), Enshrouded, NieR, Code Vein, Genshin Impact, GTFO (the more recent rundowns), Alien: Isolation, and more can be called "metroidvanias" by that standard as they all contain these aspects of utility-gated exploration/progression and guided non-linearity (some with dialogue, some with flashy "look at me!" mechanics, some with just environment design).
A term can be applied to many things but doesn't mean the term is being mis-used or abused for marketing purposes in a similar fashion to how "souls-like" is thrown onto anything difficult nowadays.