Is there a reason most Iconics no longer gain mod slots when

This mod adds a Back Weapon slot with the help of Curios API

Vehicle mods have been added to Fortnite Chapter 5 You can tell what slot a mod is for at a glance by the color of the crate

background slot Welcome back to yet another Minecraft Mod Review, In this one we review a Mod called

back slot mod This mod adds a Back Weapon slot with the help of Curios API