This Unreal Engine 5.4 video is about building the base weapon logic with enemy facing.
We start by Importing the Weapons and Ammo from Kenney’s Tower Defense Kit. We then create the Get Furthest Enemy Function in the Wave Manager Blueprint, and then setup a Utility Function to get access to the Wave Manager. Next, we create the Weapon and Turret Weapon Child Blueprints, and build the Find Enemy and Face Enemy Functions. And after some fiddling, we have Turrets facing the Enemy Furthest along the Path.
https://dev.epicgames.com/community/learning/tutorials/oLnG/unreal-engine-17-weapon-setup-and-facing-enemies-let-s-make-a-tower-defense-game