MBelt

This mod adds a belt that can be upgraded with a pouch, which gives the belt some inventory, a strap for quick access, and an ender pouch added to the mod that allows you to open the ender chest from the belt’s inventory.
Additionally, the different belts allows you to carry special items from others mod adding more curios slots, such as supplementaries, artifacts, etc. Vanilla only the bundle is accepted.

You can also add more items accepted by this slot via datapacks