Make any WooCommerce status editable

editable.php

<?php 
    add_filter( 'wc_order_is_editable', 'processing_orders_editable', 10, 2 );
    function processing_orders_editable( $is_editable, $order ) {
        if ( $order->get_status() == 'processing' ) {
            $is_editable = true;
        }
        return $is_editable;
    }