Get post content from another section in custom single page

Question

Multiple loops in the same page

<?php
// this is for customer posts
$args = array(
 'post_type' => 'customer'
   );
$the_query = new WP_Query( $args );
            ?>
            <?php if ($the_query->have_posts()) : ?>
                <?php while ($the_query->have_posts()) : $the_query->the_post(); ?>
 <?php     // loop here
  the_title(); 
the_content(); ?>
<?php endwhile; 
 wp_reset_postdata();
 else : ?>
 <p><?php _e( 'Sorry, no posts matched your criteria.' ); ?></p>
 <?php endif; ?>

<?php
    // This is for projects posts
$args = array(
 'post_type' => 'projects'
   );
$the_query = new WP_Query( $args );
            ?>
            <?php if ($the_query->have_posts()) : ?>
                <?php while ($the_query->have_posts()) : $the_query->the_post(); ?>
<?php     // loop here
  the_title(); 
the_content(); ?>
<?php endwhile; 
 wp_reset_postdata();
 else : ?>
 <p><?php _e( 'Sorry, no posts matched your criteria.' ); ?></p>
 <?php endif; ?>

You can also mix the posts like this

'post_type' => array('customer', 'projects'),