Comment Rating Field Pro Plugin: Output Comment Sorting Dropdown: https://www.wpzinc.com/documentation/comment-rating-field-pro-plugin/developers-output-comment-sorting-dropdown/

comment-rating-field-pro-plugin-output-comment-sorting-dropdown.php

<?php
/**
 * For developers and themes which do not make use of the WordPress wp_list_comments() function,
 * the below code can be added to output the dropdown options for sorting comments by rating.
 *
 * There must be a Field Group configured at Comment Rating Field Pro > Field Groups to display
 * rating fields for the Post Type the visitor is viewing.
 */ 
if ( function_exists( 'output_comment_sorting_dropdown' ) ) {
	output_comment_sorting_dropdown( $post_id, $output_style );
}