I don’t have my DevKit open and I couldn’t be bothered waiting for it as then I’d need to close F:NV, lol, but I think there’s a box that needs to be checked to “use” that specific variable. Like how Durability is set to be used, as I believe they use durability as the hatch timer for eggs.
Should be the first one in the section for the stat type. If the item rating settings are in that area, that is.
-WM