Why is Instantiated object not updating variable?

I have an instantiated object that keeps track of the player's position using this code:

     public GameObject player;
     
     void Update () {
     
     Vector3 playerPos = player.transform.position;
 
          Debug.Log(playerPos);
 
     }

For some reason it's not updating the playerPos even though it's in the update method. Any ideas why?

EDIT: I believe something was wrong with the file itself, or the way it was being handled. I created a new script with the exact same code and it worked fine. Not sure what problem was.