Custom sorting in one category

Hello.
I do custom sorting of the catalog by a certain attribute. Please tell me how you can display this sorting in only one specific category and its child categories?

I am attaching the code to create a custom sort.

/* Sort criteria with attribute */
add_filter('woocommerce_get_catalog_ordering_args', 'custom_woocommerce_get_catalog_ordering_args');
function custom_woocommerce_get_catalog_ordering_args( $args ) {
    global $wp_query;
    if (isset($_GET['orderby'])) {
        switch ($_GET['orderby']) :
            case 'pa_razmer-sazhencza' :
                $args['order'] = 'ASC';
                $args['meta_key'] = 'pa_razmer-sazhencza';
				$args['orderby'] = 'meta_value';
            break;
        endswitch;
    }
    return $args;
}
 
/* Adding a sorting method to the dropdown list */
add_filter('woocommerce_catalog_orderby', 'custom_woocommerce_catalog_orderby');
 
function custom_woocommerce_catalog_orderby( $sortby ) {
    $sortby['pa_razmer-sazhencza'] = 'По высоте';
    return $sortby;
}
 
/* Saving Attributes as Metadata*/
add_action( 'save_post', 'save_woocommerce_attr_to_meta' );
function save_woocommerce_attr_to_meta( $post_id ) {
    foreach( $_REQUEST['attribute_names'] as $index => $value ) {
        update_post_meta( $post_id, $value, $_REQUEST['attribute_values'][$index] );
    }
}