Star Ratings / sort by rating

Here’s a quick tutorial on star ratings:
https://strongplugins.com/document/strong-testimonials/star-ratings/

To sort, we must alter the query with code. Add this to your theme’s functions.php or create an mu-plugin.

/**
 * Sort by custom field: rating
 * This will exclude ratings of zero stars.
 * For Strong Testimonials.
 */
function my_testimonial_query_filter( $args, $atts ) {
	// Replace rating with the name of your custom field.
	$args['meta_key'] = 'rating';
	$args['orderby'] = 'meta_value_num ' . $args['orderby'];
	// Use 'DESC' for descending from 5 to 1, or 'ASC' for ascending from 1 to 5.
	$args['order'] = 'DESC';
	return $args;
}
add_filter( 'wpmtst_query_args', 'my_testimonial_query_filter', 10, 2 );

Would this work to sort the ratings using a dropdown?

I.e. Sort by: Rating 5* (To show all 5* ratings)?

That code alters every testimonial query.

There is no front-end UI (dropdowns, etc.) for sorting or filtering.

There are no hidden features. What you see is what you get. ??