I can't make it flip

this is the code of my enemy, how can I make it rotate depending on the position of the player?

using System.Collections; using System.Collections.Generic; using UnityEngine;

public enum EnemyState { Wander, Follow, Die, Attack };

public class EnemyController : MonoBehaviour {

 GameObject player;
 public EnemyState currState = EnemyState.Wander;
 public float range;
 public float speed;
 public float attackRange;
 public float coolDown;
 private bool chooseDir = false;
 private bool coolDownAttack = false;
 private Vector3 randomDir;

 // Start is called before the first frame update
 void Start()
 {
     player = GameObject.FindGameObjectWithTag("Player");
 }

 // Update is called once per frame
 void Update()
 {

 

     switch (currState)
     {
         case (EnemyState.Wander):
             Wander();
             break;
         case (EnemyState.Follow):
             Follow();
             break;
         case (EnemyState.Die):
             break;
         case (EnemyState.Attack):
             Attack();
             break;
     }
     if(IsPlayerInRange(range) && currState != EnemyState.Die)
     {
         currState = EnemyState.Follow;
         
     }
     else if(!IsPlayerInRange(range) && currState != EnemyState.Die)
     {
         currState = EnemyState.Wander;
     }
     if(Vector3.Distance(transform.position, player.transform.position) <= attackRange)
     {
         currState = EnemyState.Attack;
         
     }
     
 }

 private bool IsPlayerInRange(float range)
 {
     return Vector3.Distance(transform.position, player.transform.position) <= range;
 }

 private IEnumerator ChooseDirection()
 {
     chooseDir = true;
     yield return new WaitForSeconds(Random.Range(180f, 180f));

     Quaternion nextRotation = Quaternion.Euler(randomDir);
 
     chooseDir = false;
 }

 void Wander()
 {
     if (!chooseDir)
     {
         StartCoroutine(ChooseDirection());
     }

    
     if(IsPlayerInRange(range))
     {
         currState = EnemyState.Follow;
     }
 }

 void Follow()
 {
     transform.position = Vector2.MoveTowards(transform.position, player.transform.position, speed * Time.deltaTime);

 }

 void Attack()
 {
     if (!coolDownAttack)
     {
         GameController.DamagePlayer(1);
         StartCoroutine(CoolDown());
     }
 }

 private IEnumerator CoolDown()
 {
     coolDownAttack = true;
     yield return new WaitForSeconds(coolDown);
     coolDownAttack = false;
 }

}