Featured Shop Product image on Search Results

Hi there

I search a solution for display the featured image on Search page for WooCommerce Products. I found the solution for Post ID but i dont know wich i need to modify now, can you help me? Thanks a lot

I have already create a child theme and paste there the file loop-search.php and replace line 33 with this:
$searchthumb = get_the_post_thumbnail( $post_id, $size, $attr );
echo “<span class=’search-result-counter {$counterclass}’>{$searchthumb}</span>”;

and also paste CSS rule:
.search-result-counter {
padding: 0;
}

.search-result-counter img {
width: 100%;
height: 100%;
border-radius: 100px;
}

but no Shop image is displayed, because this is only for post rights?

Thanks
Regards
Nicole