BackTools For Fabric
BackTools is made for Fabric; it requires the Fabric Loader & Fabric API.
BackTools (Fabric) is a PORT of Back Tools Forge (1.16). Link: https://www.curseforge.com/minecraft/mc-mods/back-tools
It renders the last used tool in player's back and other clients are able to see it.
You can change any orientation or disable any tool in the config file.
You can disable the render of an item by it id, for example: wooden_pickaxe.
You can also disable the render for a type of tool.. for example: disablePickaxes disable the render for all pickaxes