Minecraft -So im trying to make the "hypixel skyblock dragon damage system" for a map im making

Dragon loot. Basically depending on how much damage you deal to the mob (ender dragon in this case) when it dies the person with most damage gets best loot, second best damage gets pretty good loot etc. Is there any way i can make this? A youtuber called BlueCommander

made this system in vanilla minecraft but didnt explain it. If there is data packs needed thats fine. Thanks for any help u can give. 🙂 (Minecraft Java Edition)