Hello, I've been trying to make a datapack to add compatibility with certain mod weapons that don't automatically gain weapon leveling. For example I have tried to make a data pack for the Cataclysm Mod's "Coral Spear". The data pack I have made works perfectly on a single player test world but when I upload it onto a server test world It does not show weapon leveling/ progress or display the item's damage correctly.

As you see in the image the tag gets added and I can freely change the level of the weapon. The level still adds damage to the spear and the spear correctly levels but does not show on the item.

Iron sword for comparison: