Hi, i'm new to making datapack and i'm struggling trying to make a custom loot table.

i follow the guide from many youtube tutorial but it still doesn't work, it just seem like the game doesn't detect the datapack i made. i play on 1.20.1, inside the pack.mcmeta i put pack format 15, and the loot table code i copy from loot table generator website. can anyone help me what i did wrong