How to click element on iframe? Javascript

Question

Good afternoon. On the site (for example) nnmclub.to have some ad units in the iframe. How to implement a click on them?

I clicked on the part of the href links (links are kind of like http: //site.xyz) click on .xyz. But it opens the same source site and not link that was clicked on. That is, clicks but returned nnmclub.to.

Options are tried

1. <script>
       window.onload = function() {
         document.querySelector('a[href*=".xyz"]').click(); 
       }
   </script>
   

   2.

   window.onload = function() {
       var links = document.getElementsByTagName("a");
       for (var i = 0; i < links.length; i++) {
         var link = links[i].getAttribute('href');
         if (link.indexOf('.xyz') !== -1) {
           links[i].click();
           break;
         }
       }
   }