My button doesn't show the functions I want.

Hi, I'm new to Unity and I'm doing my school project in Unity, but I don't know anything.

I've been watching tutorials of the things I'm making and at this point I have a problem, I want to change the scene by clicking a button, I have the button with an image and all the options.

  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  
  using UnityEngine.SceneManagement;
  
  public class Cambio : MonoBehaviour
  {
      
  public void LoadScene (string sceneName)
  {
        SceneManager.LoadScene(sceneName);
  }
  
  
  }
  

I've followed the tutorial of the script and everything ok but then when I put the game object with the script in the button, I have only 3 functions: GameObject, Transform and Change. But in the tutorial, the person has the function: ChangeSceneWithButton with LoadScene (string) on it, I have followed all the steps correctly but I don't know where the problem is.

My Unity version is Unity 2020.3.1f1

If you can help I thank you a lot, I'm very stuck at this point and have been searching for solutions for more than an hour. ^^

Here are some photos of the options and the GameObject I've used, the script inside the game object is the one I've texted about. Thanks.