How to automatically change Player function after picking up certain item?

Hello! I'm trying to to add a function where the Player is able to swim when they pick up an item called "snorkel" and is knocked back when not. I already have the Player Inventory script where it stores the item data but I'm not sure how to call upon it.
This is the script I have within the Player script right now. Individually the functions seem to work but I'm not sure how to phrase it together.
private void OnTriggerEnter2D(Collider2D other) { // With SNORKEL if (other.gameObject.tag == "Water" /*&& Inventory has snorkel*/) { Debug.Log("SWIMMING!"); anim.SetBool("IsSwimming", true); isSwimming = true; } // Without SNORKEL if (other.gameObject.tag == "Water" /*&& Inventory does NOT have snorkel*/) { Debug.Log("CAN'T SWIM!"); anim.SetBool("IsHurting", true); isHurting = true; isSwimming = false; //knockback Player StartCoroutine(this.KnockBack(0.04f, 700, this.transform.position)); } } private void OnTriggerExit2D(Collider2D other) { //With SNORKEL if (other.gameObject.tag == "Water" /*&& Inventory has snorkel*/) { anim.SetBool("IsSwimming", false); isSwimming = false; } // Without SNORKEL if else (other.gameObject.tag == "Water" /*&& Inventory does NOT have snorkel*/) { anim.SetBool("IsHurting", false); isHurting = false; isSwimming = false; }