you can achieve this by adding your template file to sales_order_view.xml ,
<?xml version="1.0"?> <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="admin-2columns-left" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd"> <body> <referenceBlock name="order_info"> <block class="Learning\RewriteSales\Block\Adminhtml\Order\View\Custom" name="sales_order_view_custom" template="order/view/custom.phtml" /> </referenceBlock> </body> </page>
and in your template file you can get the relevant information . for this you have to create 1.one block 'Learning\RewriteSales\Block\Adminhtml\Order\View\Custom' 2.one template 'order/view/custom.phtml' 3.and the changes to sales_order_view.xml as mentioned above ,
for more information you can refer this link enter link description here
if you face any problem , let me know , i will help :)