bbPress.org

what summary panel?

this will display any topics which have no topic tags I think

add_shortcode ('empty-tags' , 'rew_empty_tags' ) ;

function rew_empty_tags () {
	$args = array( 'post_type' => 'topic', 'posts_per_page' => -1 );
	$loop = new WP_Query( $args );
	$output = '' ;
	while ( $loop->have_posts() ) : $loop->the_post();
		$current_id = get_the_ID();
		$topic_tags = bbp_get_topic_tag_names( $current_id );
		if (empty ($topic_tags)) $output.= '<br>'.$current_id ;
	endwhile;
	
	return $output ;
}

create a private page and put the shortcode

[empty-tags] in it