Wordpress/Woocommerce: Filter orders by custom meta tag

filter orders.php

<?php

add_action( 'restrict_manage_posts', 'posts_filter_dropdown' );
function posts_filter_dropdown($post_type) {
	// error_log('$post_type ====='.$post_type);
	if('shop_order' != $post_type){
	  return;
	}
	$selected_option = @$_GET['order_type_filter'];
	echo '
		<select name="order_type_filter" id="mpms-order-type-filter">
			<option value="">', __( 'Order Type', 'wordpress-seo' ), '</option>';
		echo '<option value="takeout">Takeout</option>';
		echo '<option value="delivery">Delivery</option>';
	echo '
		</select>';
}

add_filter( 'parse_query', 'filter_request_query' , 10);
function filter_request_query($query){
	if( !(is_admin() AND $query->is_main_query()) ){ 
	  return $query;
	}
	if( !('shop_order' === $query->query['post_type']) && (isset($_REQUEST['order_type_filter']) ) ){
	  return $query;
	}
	if(0 == $_REQUEST['order_type_filter']){
	  return $query;
	}
	$query->query_vars = array(array(
	  'field' => '_store_order_type',
	  'value' => $_REQUEST['order_type_filter'],
	  'compare' => '=',
	  'type' => 'CHAR'
	));
	return $query;
}