Requires the library mod Collective (Fabric) and the Fabric API.
Passive Endermen is a minimalistic configurable mod which can prevent endermen from picking up and placing blocks. It also by default prevents them from targeting players when being looked at.
Configurable: ( how do I configure? )
preventEndermenFromTeleporting (default = true): If enabled, prevents the endermen from teleporting.
preventEndermenFromGriefing (default = true): If enabled, prevents endermen from picking up and placing blocks.
preventEndermenFromAttacking (default = true): If enabled, stops the endermen from attacking.