Need help with custom recipe

Hi, im new here and am working on some datapack stuff rn. Its been some time since i last seriously played but i hope to spend some time with friends again and wanted to add some custom recipies for that. My problem rn is, that its not working and i dont know why. I love that you dont have to do the knowledge book trick for custom items anymore but i get stuck at some corners while figuring out changes XD. Anyways heres the json file for the recipe:
{
  "type": "minecraft:crafting_shaped",
  "category": "blocks",
  "pattern": [
    " U ",
    "i#i",
    "iAi"
  ],
  "key": {
    "U": {
      "item": "minecraft:water_bucket"
    },
    "#": {
      "item": "minecraft:cauldron"
    },
    "A": {
      "item": "minecraft:campfire"
    },
    "i": {
      "tag": "minecraft:walls"
    }
  },
  "result": {
    "id": "minecraft:cauldron",
    "count": 1,
    "components": {
      "minecraft:custom_model_data": 1,
      "minecraft:item_name": "Great Cauldron",
      "minecraft:attribute_modifiers": {
        "modifiers": [
          {
            "id": "@s",
            "type": "minecraft:generic.jump_strength",
            "amount": -0.2,
            "operation": "add_value",
            "slot": "any"
          },
          {
            "id": "@s",
            "type": "minecraft:generic.movement_speed",
            "amount": -0.1,
            "operation": "add_value",
            "slot": "any"
          }
        ]
      }
    }
  }
}
Hope you can help and thx in advance.