Trouble with loot tables

I'm trying to make a datapack that lets more seeds drop from breaking grass, but for some reason it isn't working and I'm failing to figure out what the cause is. Just to be clear this is meant to be compatible with a mod, which might be the problem, but just in case I also included vanilla seeds such as beetroot, melon and pumpkin. I've linked the datapack if anyone wants to take a look at it. This is my first time messing around with loot tables so I might be getting something very wrong.