minecraft-assets/assets/minecraft/advancements/story/brew_potion.json

{
    "display": {
        "icon": "minecraft:glass_bottle",
        "title": "Brew a Potion"
    },
    "parent": "minecraft:story/obtain_blaze_rod",
    "criteria": {
        "potion": {
            "trigger": "minecraft:inventory_changed",
            "conditions": {
                "items": [
                    {
                        "item": "minecraft:potion"
                    }
                ]
            }
        }
    }
}