/give @s diamond[equippable={slot:hand}]mainhand and offhand cannot co-exist in the same item's equippable component, so it is expected there to be a hand option, but there isn't.
Comments 3
How is this a feature request if a generic "hand" option already exists for attribute modifying items?
Attribute modifiers also allow "any" and "armor" alongside "hand", because it makes it easier to refer to multiple slots at the same time without needing multiple attribute modifiers. The equippable component can only make items equippable on one slot, because using an item to swap it into a slot would not know which slot to choose if there were multiple possible slots to choose from.
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