If you want to change the "Follow" icon on the Member Directory. You can use the following function code below.

Please follow the steps below:

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( 'bp_groups_default_extension','bb_custom_group_forum_default_tab');
function bb_custom_group_forum_default_tab( $default_tab ){

  $group = groups_get_current_group();//get the current group

  if( empty( $group ) ) {
    return $default_tab;  
  }

  // Make sure it has a forum attached to it.
  if ( bbp_get_group_forum_ids( $group->id ) ) {
    return 'forum';
  }

  return $default_tab;
}

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/