Minecraft Fabric mod that adds a /clientgive command to get items client side
Items will become real if you are in creative mode and open your inventory after getting the item
/clientgive <item> [<count>]
You can use item components, for example /clientgive minecraft:diamond_sword[minecraft:damage=50] will give you a diamond sword with 50 durability taken off from it
Use this on servers at your own risk! Things like placing client side blocks then jumping onto them may trigger servers' anticheats