How to get the current items in my inventory with respective stock of the items

Hi!! I'm making a simple dungeon crawler for mobile but I'm not experienced with C#. So, I just want to display the item in the player's inventory when he collides with items. I'm using a dedicated item class that holds the info of that item and an inventory class that accesses the item class list, etc. This is the Item Class:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 public class Items : MonoBehaviour
 {
     //List
     public static List<Items> listItem = new List<Items>();
 
     public string name;
     public string type;
  
     //Constructor
     public Items(string n, string t)
     {
        this.name  = n;
         this.type = t;
 
     }
     //Default Constructor
     public Items()
     {
 
     }
 
 }

Inventory Class:

 using System.Linq;
 using UnityEngine;
 using UnityEngine.UI;
 
 public class Inventory : MonoBehaviour
 {
 
     public Text title;
     public Text countItem;
     Items item;
 
     void Start()
     {
         item = new Items();
 
     }
     private void OnTriggerEnter2D(Collider2D collision)
     {
 
       // Checking for the item collision
 
         if (collision.gameObject.tag == "item")
         {
            
             Items currItem = collision.gameObject.GetComponent<Items>();
             //getting the data of the item collided
            item.name = currItem.name;
            item.type = currItem.type;
             //storing in string for checking the condition
             string name = item.name;
             string type = item.type;
 
             //Adding the item collided
             Items.listItem.Add(item);
 
             //Displaying the title of item in text
             title.text = item.name;
 
             // Displaying the current stock of that single item in text  (which isn't working)  
             countItem.text = (Items.listItem.Count(x => x.name == name)).ToString();
 
         }
     }
 
    
 
 
 }

This is the problem here, instead of displaying just the "Axe" count, it's displaying the whole list! Please help me.