WordPress recent post

From your static page you can make a jQuery GET request ( using jQuery is not mandatory though can be the easiest way) to the default endpoint posts of the WP rest of your installation.

More info about WP REST here:
https://developer.wordpress.org/rest-api/

<!DOCTYPE html>
<html lang="en">
  <head>
  <meta charset="UTF-8">    
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
</head>
<body>

  <ul id="remoteList">

  </ul>

  <script>

    jQuery.get('//sub.example.com/wp-json/wp/v2/posts').then(
      function(response){
        jQuery.each(response,function(index,post){
          console.log(post);
          $('#remoteList').append('<li><a href="'+post.link+'" target="_blank">'+post.title.rendered+'</a></li>')
        })
      }
    );
    </script>      
</body>
</html>