A simple datapack that adds in a custom advancement, to obtain it in a world that has the data pack installed, gather all golden items. (gold armor + tools & golden apple + enchanted apple) to install, once downloaded, create a new world or play on an existing one, to add the datapack, click on a world, click on edit world, open world file, click on the datapack folder and open it then drag the data pack into the datapack folder and go back into Minecraft and click save, if it doesn't work, do /reload. I suggest first testing it in a creative mode super flat world with cheats enabled.