Default Featured Image

Is there a way to show a specific default image if there is no featured image on a post within the Spectra Post Grid. I know how to add items before and after blocks within the grid using hooks and filters, but I can’t find documentation anywhere to use a specific image if no image is found.

I am using it throughout the rest of my website fine with the following

<?php if ( has_post_thumbnail() ) {
	the_post_thumbnail();
} else { 

	$image = get_field('default_header','options');
 ?>
    <img src="<?php echo esc_url($image['url']); ?>" alt="<?php echo esc_attr($image['alt']); ?>" />
	
<?php }  ?>