If you want to display the number of topics in your bbPress forums directly on your WordPress dashboard, use the following PHP code snippet:

<?php
function bbpress_dashboard_topic_count() {
    $topic_count = wp_count_posts( 'topic' )->publish;
    echo 'Total Topics: ' . $topic_count;
}
add_action( 'wp_dashboard_setup', 'bbpress_dashboard_topic_count' );
?>

This code will show the total number of published topics in your bbPress forums on the WordPress dashboard, allowing you to easily monitor forum activity.