custom_mc_advancements/data/canopy/advancement/keto_diet.json

{
  "display": {
    "icon": {
      "id": "minecraft:spider_eye"
    },
    "title": "Keto Diet",
    "description": "Eghhh",
    "frame": "task",
    "announce_to_chat": true
  },
  "parent": "canopy:food",
  "criteria": {
    "eat_100_spider_eye": {
      "trigger": "minecraft:consume_item",
      "conditions": {
        "item": {
          "items": "minecraft:spider_eye",
          "count": {
            "min": 100
          }
        }
      }
    }
  }
}