I want to turn on Sprite Renderer for ALL of a specific prefab if it has right Tag

 public class Coins : MonoBehaviour
 {
     public SpriteRenderer spriteRenderer;
   
     void Start()
     {
 
         this.spriteRenderer = GetComponent<SpriteRenderer>();
     }
 
     private void OnTriggerEnter2D(Collider2D collision)
     {
         gameObject.tag = "Collected";
         this.spriteRenderer.enabled = false;
 
         GameObject.Find("GameSession").GetComponent<GameSession>().CoinCollected();
       
     }
 
     public void CoinRespawn()
     {
         if (gameObject.tag == "Collected")
         {
             spriteRenderer.enabled = true;
         }
 
     }
 
 }
 

When player hits coin its tag changes from Uncollected to Collected and disappears (although it's still there, just it's sprite renderer is turned off - I would also plan to turn off the trigger collider so it can't be interacted with)

Then in other script if player reaches save point the coins are destroyed (this works), if player hits enemy before save point the coins collected need to come back into play to be collected again, so if player hits enemy the other script calls back to this one via the public void coinRespawn, but it will only respawn one coin no matter how many have been disabled by the player touching them.

How can I make all coins with the tag Collected reappear? Or am I going about this in completely the wrong way? (very likely)

Many Thanks

Dominic