Projectiles aren't hitting enemies

Hi!

I have made some scripts for the player to shoot and the enemy to take damage, I have added colliders etc. so they should be hitting each other and the bullet should be subtracting health from the enemy and then destroying them but the projectile seems to pass through without damaging the enemy. I've been looking around but there doesn't seem to be anywhere that provides answers.

Thanks in advance!

Part of projectile script that is being used to damage enemy:

 public int damageToGive;
 void OnCollisionEnter2D(Collision2D other){
 
         if (other.gameObject.tag == "Enemy") {
             other.gameObject.GetComponent<EnemyHealthManager> ().HurtEnemy (damageToGive);
         }
     }

Part of the EnemyHealthManager script that is meant to be taking away the health:

 public int health;
 
 public int currentHealth;
 
     void Start () {
         currentHealth = health;
         
     }
     
     void Update () {
         if (currentHealth <= 0) {
             Destroy (gameObject);
         }
     }
 
     public void HurtEnemy(int damage){
         currentHealth -= damage;
     }
 }