Displaying custom fields in the orders

Hi, If I understand correctly, you wanted to display custom fields values to Order Archive Page itself right.?

You can do some thing like this

add_filter( 'manage_edit-shop_order_columns', 'my_custom_column_handler' );
function my_custom_column_handler( $columns ){
	$new_columns = ( is_array( $columns ) ) ? $columns : array();
	unset( $new_columns['order_actions'] );
	$new_columns['custom_column'] = 'CUstom Column';
	$new_columns['order_actions'] = $columns['order_actions'];
	return $new_columns;
}

add_action( 'manage_shop_order_posts_custom_column', 'my_custom_column_value_handler', 2 );
function my_custom_column_value_handler( $column ){
	global $post;

	if( $column == "custom_column" ) {
		// Loop through your order line items & display whatever custom fields you want
		// using wc_get_order_item_meta( $item_id, $key );
	}
}