gistfile1.txt

add_filter('before_send_order_to_iconnect', function ($baseOrder) {
    $order = wc_get_order($baseOrder->order_id);
    if (!$order) return $baseOrder;

    $piDate = $order->get_meta('pi_delivery_date', true);
    $piTime = $order->get_meta('pi_delivery_time', true);
    $ts = '';
    if (!empty($piDate) && !empty($piTime)) {
        $timePart = trim(explode('-', (string) $piTime)[0]); // "10:00 - 10:30" -> "10:00"
        $ts = strtotime(trim($piDate . ' ' . $timePart));
        //if ($ts) 
        $baseOrder->delivery_time = wp_date('H:i d-m-y', $ts);
    }

    if (!empty($piDate) || !empty($piTime)) {
        $timePart = trim(explode('-', (string) $piTime)[0]);
        $extra = 'Requested for ' . trim($piDate . ' ' . $timePart). wp_date('H:i d-m-y', $ts);
        $baseOrder->cust_instruction = trim($baseOrder->cust_instruction . ' | ' . $extra, ' |');
    }

    return $baseOrder;
}, 20);