Sticky header is not working Fixed header.

there is another issue, but they confirm that it works
https://www.drupal.org/project/bootstrap_table/issues/3378593 🐛 Sticky headers not working Fixed

The solution is to add the hook to your custom theme and add the offset from the top accordingly.

/**
 * Implements hook_preprocess_views_view_bootstraptable().
 */
function template_preprocess_views_view_bootstraptable(&$variables) {
  $view = $variables['view'];
  $style = $view->style_plugin;
  $options = $style->options;
  if ($options["extension"]['sticky_header'] == 1) {
    if (\Drupal::currentUser()->hasPermission('access toolbar')) {
      // Set the Header offset from the top.
      $variables["attributes"]['data-sticky-header-offset-y'] = 80;
    }
  }
}