Oculus Go VR App, buttons UI event/trigger not working

I've got a problem with my code where it's not executing properly. This code is supposed to automatically load the next scene after all 6 buttons have been pressed. But nothing happens even after I press all the buttons. I've included a PNG of what the app is supposed to look like. Please help me out

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3. using UnityEngine.SceneManagement;
4.  
5. public class finishChangeScene : MonoBehaviour
6.     {
7.     //When all main buttons are not active, change to next scene
8.     public Button btn1;
9.     public Button btn2;
10.     public Button btn3;
11.     public Button btn4;
12.     public Button btn5;
13.     public Button btn6;
14.  
15.  
16.     void checkButton()
17.     //if btn1, btn2, btn3, btn4, btn5, and btn6 are all NOT active load next scene
18.     {
19.         if (btn1.IsActive() == false &&
20.             btn2.IsActive() == false &&
21.             btn3.IsActive() == false &&
22.             btn4.IsActive() == false &&
23.             btn5.IsActive() == false &&
24.             btn6.IsActive() == false)
25.         {
26.             loadScene();
27.         }
28.         else
29.         {
30.             ;
31.         }
32.  
33.     }
34.  
35.     void loadScene()
36.     {
37.         SceneManager.LoadScene("5.StakeholderMenu");
38.     }
39. }
40.