I tried to make chesse and salt tag is missing.

As a workaround added salts.json to data/c/tags/item directory in mod jar, but it only lets you use croptopia:Salt item

{
  "values": [
    "croptopia:salt",
    "#c:salts"
  ]
}

Same, missing tag c:salts while making food.

[02Dec2024 20:28:07.193] [Render thread/WARN] [net.minecraft.core.MappedRegistry/]: Not all defined tags for registry ResourceKey[minecraft:root / minecraft:item] are present in data pack: c:melons, c:salts

yeah, can we fix by yourself?