0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)

1. Describe the bug
   On the realm the mod exists but they cannot be crafted, or even placed out of creative.

2. Write steps to reproduce the bug
   Join realm
   get materials to craft a basic backpack parts
   put them in the crafting table

3. What is expected behaviour
   a piece of the backpack to be crafted

4. Screenshots (If applicable)
   
   

you can't use mods on Minecraft Realms