Neither house has complicated “stories,” and the lore isn’t that overly complicated either.
SCarey is revisiting houses that took place in Carey, Ohio. There is not deeper narrative for that, and the lore is “Carey.”
Icons is “the Icons are trapped in Fear’s lantern.” That’s the story. There can be lore about the lantern itself, but beyond that there isn’t a lot to deeply explain unless it’s a full dissertation.