Destroy an instance of a bullet after firing it

< I'm developing a simple 2D tank-shooting game. I have a script which uses to (and only to) instantiate and launch a bullet prefab. This script is being called by a script which attached to player named PlayerController() (when press Fire1 button for specific).>

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class BulletBehaviourController : MonoBehaviour {
 
     public GameObject bulletLauncher;  // This is the Empty GameObject which I attached the script to
     public GameObject[] bulletPrefab;  // This is the list of prefabs of my bullet. Because my tanks have various types of bullet so I have to use a list and then, via my SystemEventHandler() script, I can change the bullet type dynamically by changing the value of typeOfBullet variable
 
     public int typeOfBullet = 1;   // This variable is uses to change the type of bullet
 
     public float force = 15f;  // This variable defines how much force to applies on the bullet's instance
 
     private void OnTriggerEnter(Collider touchedGameObject)
     {
         if (touchedGameObject.gameObject.tag == "CanBeDestroyByBullet")
         {
             Destroy(touchedGameObject);
             // I want to destroy its instance (bulletInstance) here
         }
         else if (touchedGameObject.gameObject.tag == "CantBeDestroyByBullet")
         {
             Debug.Log("Hit undstructive GameObject");\
             // I want to destroy its instance (bulletInstance) here
         }
     }
 
     public void BulletLauncher ()
     {
         GameObject bulletInstance = Instantiate(bulletPrefab[typeOfBullet], bulletLauncher.transform.position, transform.rotation) as GameObject;   // I want to destroy this instance
 
         bulletInstance.GetComponent<Rigidbody2D>().AddForce(bulletInstance.transform.up * force, ForceMode2D.Impulse); // This is use to launch the bullet's instance
 
         Destroy(bulletInstance, 5.0f);
     }
 }

The problem is: I don't know how to destroy bulletInstance in OnTriggerEnter(). Note that I have assigned Collider2D and Rigidbody2D component on every GameObject and set Collider2D of bullet prefab to Is Trigger. If need I can provide my PlayerController() script, but I don't think it's neccesary.

Thanks for your help : )