Views Infinite Scroll progress Indicator
I was able to do this as below.

Add the below in your custom.js file

// Sets the fullscreen progress indicator.
(function ($) {
  'use strict';
  Drupal.behaviors.privacyPolicyLinked = {
    attach: function (context) {
      Drupal.Ajax.prototype.setProgressIndicatorFullscreen = function () {
        this.progress.element = $('&lt;div class="ajax-progress ajax-progress-fullscreen"&gt;&amp;nbsp;&lt;/div&gt;');
        $('body .pager').before(this.progress.element);
      };
    }
  };
})(jQuery);


And in your custom.css , add your styles as below

.ajax-progress-fullscreen {
  background: url($assetsPath + '/images/status-active.gif') no-repeat center center;
  min-height: 16px;
  opacity: .9;
  padding: 3px;
  vertical-align: middle;
  width: 16px;
  position: relative;
}