custom_mc_advancements/data/locations/advancements/root.json

{
    "display": {
        "icon": {
            "item": "minecraft:filled_map"
        },
        "title": "Sightseeing",
        "description": "Submit your locations on discord to get a custom advancement!",
        "frame": "task",
        "background": "minecraft:textures/block/lime_concrete.png",
        "show_toast": false,
        "announce_to_chat": false
    },
    "criteria": {
        "instant": {
            "trigger": "minecraft:tick"
        }
    }
}