Hello, please tell me what depends on the display of buttons with the function to mark the product as sold or in the reservation, I somehow these buttons are missing and can not find in the admin how to turn them on

I found this function function eps_extra_fields_hide() {
  $list = trim(eps_param('post_extra_exclude'));

  $array = explode(',', $list);
  $array = array_map('trim', $array);
  $array = array_filter($array);

  if(!empty($array) && count($array) > 0) {
    return $array;
  } else {
    return array();
  }
}, but I don't understand where the settings in the admin area come from

These are shown in user items section.
No filter.

These are shown in user items section.
No filter.

Thanks!