By default, we do not have this option. 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 “?>”:
function change_display_name_format($display_name_format) { // Change the display name format to 'last_name - first_name' $display_name_format = '%last_name% - %first_name%'; return $display_name_format; } add_filter('bp_core_display_name_format', 'change_display_name_format');
5. Click Update File to save the changes.