Rotating a turret only in Y axis towards an enemy [Not working with prefabs]

Hi, so i want to create a "turret" w$$anonymous$$ch is targeting the closest enemy in range. The turret is not moving and i only want to rotate in the Y axis to turn. It's a 2D, Top Down perspective.

It is working if i attach the enemy from my Hierarchy to the Transform. The turret will always face towards the enemy.

But if i create a prefab and i attach the prefab to the Transform it will not face the enemy.

Also the script is on the Turret GameObject.

Also i found a few solution but it only worked for 1 enemy only. I want to spawn more type of enemies and they worked only if it was only 1 GameObject and not a list of an enemies.

I hope you can roughly understand what I wrote. Can somebody help me with that please ? It's probably easy to solve but i couldn't figure it out.

Thank you!

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class AI : MonoBehaviour
 {
     public Transform test;
 
     bool inRange;
 
     // Start is called before the first frame update
     void Start()
     {
         
     }
 
     // Update is called once per frame
     void Update()
     {
         if (inRange)
         {
             transform.LookAt(new Vector3(test.position.x, transform.position.y, test.position.z));
         }
 
     }
 
     private void OnTriggerEnter(Collider other)
     {
         if (other.gameObject.TryGetComponent<Enemy>(out Enemy enemy))
         {
             inRange = true;
             Debug.Log("Target Found!");
         }
 
     }
 
 }