Want AI to follow the player, NavMeshAgent

Hello everyone,
I have set up the Navmesh Agents to follow my player as you can see in the attached image, but only those prefabs in scene hierarchy window are able to follow the player. The agents which I have instantiated from the "Spawner" script, they wont follow the player.
It would mean alot if solved.
Thankyou!

Spawner Script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Spawner : MonoBehaviour
{

public Wave[] waves;
public Enemy enemy;
public Transform spawnPoint;

Wave currentWave;
int currentWaveNumber;

int enemiesRemainingToSpawn;
float nextSpawnTime;


private void Start()
{
NextWave();
}
private void Update()
{
if (enemiesRemainingToSpawn > 0 && Time.time > nextSpawnTime)
{
enemiesRemainingToSpawn--;
nextSpawnTime = Time.time + currentWave.timebetweenSpawns;

Enemy spawnedEnemy = Instantiate(enemy, spawnPoint.position, Quaternion.identity) as Enemy;


}
}

void NextWave()
{

currentWaveNumber++;
currentWave = waves[currentWaveNumber - 1];
enemiesRemainingToSpawn = currentWave.enemyCount;
}

[System.Serializable]
// Start is called before the first frame update
public class Wave
{

public int enemyCount;
public float timebetweenSpawns;
}
}





Enemy Script:

using System.Collections;

using UnityEngine;
using UnityEngine.AI;


public class Enemy : MonoBehaviour
{

public Transform player;
public NavMeshAgent enemy;

// Start is called before the first frame update
void Start()
{
enemy = GetComponent<NavMeshAgent>();


}


// Update is called once per frame
void Update()
{
enemy.SetDestination(player.position);
}
}