reverse lookup acf relationship field and passing variable in template part

acf-relation

<?php 
$auctionend='';
$args = array(
    'post_type' => 'auction',
    'meta_query' => array(
        array(
            'key' => 'connect_property_single',
            'value' => '"'. get_the_ID() .'"',
            'compare' => 'LIKE'
        )
    )
);
$loop = new WP_Query($args);
if($loop->have_posts()) : 
while($loop->have_posts()) : $loop->the_post();
$auctionend = get_field( 'auction_end' );
endwhile;
endif;
wp_reset_query();
?>
<section class="container-fluid" id="section7">
    <div class="container">
        <div class="row">
            <?php set_query_var( 'auctionend', $auctionend ); ?>
            <?php get_template_part( 'content/content', 'property' ); ?>
        </div>
    </div>
</section>