Scriptable Object Aren't being Added to List

I've been running into t$$anonymous$$s problem, and I can't see what's causing it. I have 3 scripts:

The first one, contains a void Pickup() that runs whenever I interact with an object.

T$$anonymous$$s calls a void from a second script, w$$anonymous$$ch adds the scriptable object to a List.

The t$$anonymous$$rd one is a scriptable object called 'item'

The Debug.Log function in the second prints the name of the Scriptable object, and any other values it has.

However the scriptable object isn't added to the list, but the name and values are printed Here are the scripts:
First script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Interactable : MonoBehaviour
 {
     public float radius = 1.5f;
     public bool isItem = true;
     public item newItem;
 
     public virtual void Interact()
     {
         if(isItem)
         {
             Pickup();
         }
     }
 
     void Pickup()
     {
         Inventory.instance.AddItem(newItem);
         Destroy(gameObject);
     }
 
     void OnDrawGizmosSelected()
     {
         Gizmos.color = Color.yellow;
         Gizmos.DrawWireSphere(transform.position, radius);
     }
 }  

Second Script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Inventory : MonoBehaviour
 {
 
     #region Singleton   
     public static Inventory instance;
     void Awake ()
     {
         instance = t$$anonymous$$s;
     }
     #endregion
     
     public List<item> itemList = new List<item>();
     public int Count = 0;
 
     public void AddItem(item NewItem)
     {
         if (NewItem.isDefaultItem)
         {
             itemList.Add(NewItem);
             Debug.Log(NewItem.name + " " + NewItem.value +" Added");
         }
     }
 
     public void Remove(item NewItem)
     {
         itemList.Remove(NewItem);
     }
 
     private void Update() 
     {
             Count = Count = itemList.Count;
     }
 }  

T$$anonymous$$rd Script

 using UnityEngine;
 //Scriptable Object
 [CreateAssetMenu(fileName = "newItem", menuName = "Inventory/new_Item")]
 public class item : ScriptableObject 
 {
     new public string name = "New Item";
     public Sprite icon = null;
     public float value = 0f;
     public bool isDefaultItem = false;
 
 }  

All the code runs without any errors