Actually this is totally possible in the code, it’s just that it wasn’t handled well enough to be mainlined when it was presented (but all the behind the scenes stuff was and went in just fine).
To make an individual item you can either use the [ARM], [HAND], [LEG], or [FOOT] cover tag, which will automatically make them spawn in left and right variants. (They will usually spawn in pairs, but occasionally spawn in singles). When crafting you will only craft one, and it will allow you to select either the left or right side. If something has multiple sided cover flags (such as [ARM][FOOT]) then the game will put them all on the same side (so that would cover either the right arm and left foot or the left arm and left foot).
If you wish to have something specifically be on a certain side You just stick either a “L_” or a “R_” in front of it (i.e. [L_FOOT]). For an example at this look at the special glove that the Thriller drops, it’s worn on only one hand.
As for what the eventual goal is, I’d like to split up gloves and whatnot into left and right sides, the difficult part comes in getting it so that it doesn’t force more micromanagement and work onto the player to maintain and manage all of their equipment.
