Edit order

add_filter( ‘wc_order_is_editable’, ‘wc_make_completed_orders_editable’, 10, 2 );

function wc_make_completed_orders_editable( $is_editable, $order ) {
// You can change ‘completed’ to ‘processing’ or any other status as needed
if ( $order->get_status() == ‘completed’ ) {
$is_editable = true;
}
return $is_editable;
}