bulk_action_modal.twig

<div class="modal fade" id="bulkActionModal" data-bs-backdrop="static" data-bs-keyboard="false"
     tabindex="-1" aria-labelledby="bulkActionLabel" aria-hidden="true">
  <div class="modal-dialog modal-dialog-centered">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="bulkActionLabel"></h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="{{ t('Cancel') }}"></button>
      </div>
      <div class="modal-body"></div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{{ t('Cancel') }}</button>
        <button type="button" class="btn btn-primary" id="bulkActionContinue">{{ t('Continue') }}</button>
      </div>
    </div>
  </div>
</div>