IMoO/loot_tables/entities/zombified_piglin_rider_gear.json

{
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "item",
          "name": "minecraft:warped_fungus_on_a_stick",
          "weight": 1
        }
      ]
    }
  ]
}