You must create an item definition file for iron_ball inside behavior_pack/items/ .
Step 8 — Packaging and distribution
These are the gold standard for compatibility. Rather than converting individual files, Geyser acts as a bridge that allows Bedrock players to join Java servers, translating the data in real-time. convert jar to mcpack
If you want a Java mod's features in Bedrock, you have two options: You must create an item definition file for