Ninja Forms - Pre-populate radio list

functions.php

add_filter( 'ninja_forms_render_options', function($options,$settings){
   if( $settings['key'] == 'example_field' ){
        
        // Note! The global $post variable is null when this filter is run 
        // in the context of the merge tag {fields_table}.
        global $post;

        $args = array(
           'post_type'      => 'page',
           'p'              => $post->ID, // or get_the_ID()
           'posts_per_page' => 1
  
       );

       $the_query = new WP_Query( $args ); 
       
       if ( $the_query->have_posts() ){
           while ( $the_query->have_posts() ){
               $the_query->the_post();
               
              $options[] = array(
                'label' => get_the_title(), 
                'value' => get_the_ID()
              );
           }
           wp_reset_postdata(); 
       }
   }
   return $options;
},10,2);