Create/src/main/resources/data/create/advancements/shadow_steel.json

{
    "display": {
        "title": {
            "translate": "advancement.create:shadow_steel"
        },
        "description": {
            "translate": "advancement.create:shadow_steel.desc"
        },
        "icon": {
            "item": "create:shadow_steel"
        },
        "frame": "goal",
        "show_toast": true,
        "announce_to_chat": true,
        "hidden": false
    },
    "criteria": {
        "alloy": {
            "trigger": "minecraft:inventory_changed",
            "conditions": {
                "items": [
                    {
                        "item": "create:shadow_steel"
                    }
                ]
            }
        }
    },
    "parent": "create:chromatic_compound"
}