How to display unlimited swiper-slide using toolset on wordpress?

Question

WordPress

I have a loop for displaying slides in the gallery section. It is necessary to add photos using the add new button so that their number is not limited. But the photos are not displayed if you loop one slide.

<div class="swiper-container swiper-gallery">
            <!-- Additional required wrapper-->
            <ul class="swiper-wrapper my-gallery" itemscope="" itemtype="http://schema.org/ImageGallery">
              <!-- Slides-->
             <?php $query = new WP_Query( array( 'post_type' => array( 'gallery' ),  'order' => 'ASC'  )); if ( $query->have_posts() ) : while ( $query->have_posts() ) : $query->the_post(); ?>
              <li class="swiper-slide" itemprop="associatedMedia" itemscope="" itemtype="http://schema.org/ImageObject"><a title="click to zoom-in" href="<?php echo get_post_meta($post->ID,'wpcf-foto', true); ?>" itemprop="contentUrl" data-size="1200x600"><img src="<?php echo get_post_meta($post->ID,'wpcf-foto', true); ?>" itemprop="thumbnail" alt="Image description"></a></li>
                    
              <?php endwhile; endif; wp_reset_query(); ?>
            </ul>
           
          </div>