Magento2: How to get dynamically order number

in file path:

SRDeliveryDateviewadminhtmltemplatesorder_info_shipping_info.phtml

code:

        < ?= $block->escapeHtml(__('Delivery Date Information')) ?>
    

            < ?= __('Delivery Date') ?>
            < ?= $block->getDeliveryDate() ?>
        

            < ?= __('Comment') ?>:
            

            < ?= $block->getDeliveryComment() ?>
        

            < ?= __('Test') ?>:
            

            < ?php
                $orderid = 33;
                $objectManager = MagentoFrameworkAppObjectManager::getInstance();
                $order = $objectManager->create('MagentoSalesApiDataOrderInterface')->load($orderid);

                //fetch whole order information
                //print_r($order->getData());

                //Or fetch specific information
                //echo $order->getIncrementId();
                //echo $order->getGrandTotal();
                //echo $order->getSubtotal();
                echo $order->getDeliveryDropdown();
            ?>
        

In line:

$orderid = 33;

I want get dynamically order number after place order.

Can anyone help create block and call to phtml file?