Add disclaimer notice after all Elementor HTML widgets that use id 'html_notice'

function.php

<?php
add_action( 'elementor/widget/render_content', function( $content, $widget ) {
  if ( 'html' === $widget->get_name() ) {
    $settings = $widget->get_settings(); //contains all widget settings - read-only!
    
    //checks if special id exists
    if ( ! empty( $settings['_element_id'] ) && $settings['_element_id'] === 'html_notice' ) {
      $content .= '<div class="disclaimer_notice"><span>Copy and use of the above code is at your own risk.</span></div>';
    }
  }
  return $content;
}, 10, 2 );
?>