xarxaprod-wp-theme/template-parts/section-agenda.php

<?php
/**
 * Template part for displaying posts from category "agenda"
 *
 * @link https://developer.wordpress.org/themes/basics/template-hierarchy/
 *
 * @package Xarxaprod_theme
 */

?>

<aside id="agenda" class="agenda ">
    <header>
      <h2> <?php echo esc_html__('Agenda', 'xarxaprod'); ?></h2>
    </header>
	  <main class="xarxaprod-agenda">
   
     <?php 
     // https://developer.wordpress.org/reference/functions/get_posts/
     // https://www.advancedcustomfields.com/resources/true-false/
     $agenda_query = new WP_Query(
       array(
         'post_type' => array( 'post' ),
         'post_status' => 'publish',
         'posts_per_page' => '3',
         'tax_query' => array (
           array (
             'taxonomy' => 'category',
             'field'    => 'slug',
             'terms'    => 'activitats','actividades','agenda','agenda-es'
           )
         )
       ) );
     ?>
     <?php if ( $agenda_query->have_posts() ) : ?> 
       <?php while ( $agenda_query->have_posts() ) : $agenda_query->the_post(); ?>
         <div class="xarxaprod-card-each xarxaprod-agenda-info-field">
           <header class="entry-header">
            <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" rel="bookmark" class="">
             <?php the_title( '<h3 class="entry-title">', '</h3>' ); ?>
              </a>
           </header><!-- .entry-header -->
           <section class="activity-organizer organiza-activitat">
           <?php if( get_field('xxp_agenda_who') ): ?>
             <?php $allwhoproposes = get_field('xxp_agenda_who'); ?>
             <p class="item-xxp-agenda-who">
               <?php
                 foreach( $allwhoproposes as $eachwhoproposes ):
                   echo $eachwhoproposes['label'];
                 endforeach;
               ?>
             </p>
           <?php endif; ?>
           </section>
           <aside class="agenda-date agenda-data">
           <?php if( get_field('xxp_agenda_date_start') ): ?>
             <p class="item-xxp-agenda-date-start"><?php the_field('xxp_agenda_date_start'); ?></p>
           <?php endif; ?>
           </aside>
         </div>
       <?php endwhile;//end of the loop ?>
     <?php wp_reset_postdata(); ?>
     <?php else : //if no post in query ?>
         <p class="no-content"></p>
     <?php endif; //end query ?>
   
    </main>
</aside>