Pvp world item drop help

Hello everyone I am currently running a bukkit and spigot server on 1.21 and i am having problems in my pvp world. I want to make it so that people can not drop items when they die. Side note I would also like there to be a sign for people to clear their inventory. my server's plugins are as listed: BetterRTP, ChestShop, CoreProtect, DeadChest, DecentHolograms (Not working), EssentialsX, EssentialsXChat, EssentialsSpawn, EssentialsXDiscord, EssentialsXDiscordLink, GreifPrevention, Gsit Luckperms, Multiverse-Core, Multiverse-Inventories, Multiverse-NetherPortals, Mutiverse-Portals, TAB, Vault, VeinMiner, WorldEdit, and WorldGuard. Important information!!! I have already tried making it in world guard item-drops deny and with the gamerule doEntityDrops false and neither of these solutions seem to be working. Your help would be greatly appreciated Thank you!