passing parameters to wordpress's get_template_part on version 5.5+

get_template_part wp5.5.php

//the third variable is an array where you can pass any variables or complete objects
<?php get_template_part('template-parts/featured-image',null,[
	'subHead' => get_field('title_sub-head')
]); ?>

//in the part, you use the key $args to pass the parameters.
<?php if ( has_post_thumbnail( $post->ID ) ) : ?>
<section class="hero" style="background-image: url(<?php the_post_thumbnail_url(); ?>);">
			<?php echo $args['subHead']; // here you pass the arguments with the variable $args?>
</section>
<?php endif; ?>