BetterSuicide

BetterSuicide is a simple, lightweight and modern plugin that replaces OldSchoolKill

Fully compatible with Minecraft 1.21.11 and Java 21+

It DOES NOT require any permission setup. By default, players have access to /kill and /suicide.
This also prevents players without the appropriate permissions from using /kill to kill other entities

It also provides the popular alternative command "/suicide"