How do i make a loot table replacement?

i tried to make a custom loot table for zombie but for some reason this doesnt work. i followed multiple tutorials, the datapack structure is data/minecraft/loot_tables/entities/zombie.json. the pack mcmeta format is set to 1.21.3 which is 57, and i dont get any warning on the logs. i also tried using an alternative, simpler loot table: { "type": "minecraft:entity", "pools": [ { "rolls": 1, "entries": [ { "type": "minecraft:item", "name": "minecraft:diamond", "weight": 1, "functions": [ { "function": "minecraft:set_count", "count": { "min": 1, "max": 10 } } ] } ] } ] } but i still cant find the issue.