By default, we do not have this option. https://prnt.sc/vPnintsWPZEB

You can use the following function code. Please see the steps below:

Note: Make sure to have a complete site backup before proceeding

1. Go to Appearance > Theme Editor.

2. Under Select theme to edit, choose (BuddyBoss Child/whatever theme is active), then click Select.

3. Below Theme Files, select Theme Functions (functions.php).

4. Append the code just before the closing PHP tag “?>”:

add_filter( 'bbp_after_list_forums_parse_args', 'bb_show_sub_forum_count' );
function bb_show_sub_forum_count( $args ) {
  $args['show_topic_count'] = true;
  return $args;
}

5. Click Update File to save the changes.

Note: Any modifications are considered as custom work already. Know more about our Support Policy here: https://www.buddyboss.com/support-policy/