How to display every featured image of a post in a post in wordpress

I have a single page template called single-businesses.php which shows different brands and its information. However underneath, I want to show featured images of every post within this file. Is there any way to do this in wordPress?

Yes, you can use a loop to do that. Similar to how posts are displayed in your blog page. Just exclude the_content() and anything else you don't need. The following code will display only the featured images (which are referred to as the_post_thumbnail()):

<?php 
if ( have_posts() ) {
    while ( have_posts() ) {
        the_post(); 
        the_post_thumbnail();
    }  //end while
} //end if
?>