Ttdfjt

Magento 2.2.6 When we do order offline,Payment validation not working.

I tried

<?php if ($block->hasMethods()) : ?>
 <div id="order-billing_method_form">
 <dl class="admin__payment-methods">
 <?php
 $_methods = $block->getMethods();
 $_methodsCount = count($_methods);
 $_counter = 0;
 $currentSelectedMethod = $block->getSelectedMethodCode();
 ?>
 <?php foreach ($_methods as $_method) :
 $_code = $_method->getCode();
 $_counter++;
 ?>
 <dt class="admin__field-option">
 <?php if ($_methodsCount > 1) : ?>
 <input id="p_method_<?= $block->escapeHtml($_code); ?>"
 value="<?= $block->escapeHtml($_code); ?>"
 type="radio" name="payment[method]"
 title="<?= $block->escapeHtml($_method->getTitle()); ?>"
 onclick="payment.switchMethod('<?= $block->escapeHtml($_code); ?>')"
 <?php if ($block->getSelectedMethodCode() == $_code) : ?>
 checked="checked"
 <?php endif; ?>

 class="admin__control-radio"
 **[![enter image description here][1]][1]**data-validate="'validate-one-required-by-name':true"/>****
 <?php else : ?>
 <span class="no-display">
 <input id="p_method_<?= $block->escapeHtml($_code); ?>"
 value="<?= $block->escapeHtml($_code); ?>"
 type="radio"
 name="payment[method]" class="admin__control-radio"
 checked="checked"/>
 </span>
 <?php endif; ?>

 <label class="admin__field-label" for="p_method_<?= $block->escapeHtml($_code); ?>">
 <?= $block->escapeHtml($_method->getTitle()) ?>
 </label>
 </dt>
 <dd class="admin__payment-method-wrapper">
 <?= /* @noEscape */ $block->getChildHtml('payment.method.' . $_code) ?>
 </dd>
 <?php endforeach; ?>
 </dl>
 </div>
 <script>
 require([
 'mage/apply/main',
 'Magento_Sales/order/create/form'
 ], function(mage) 
 mage.apply();
 <?php if ($_methodsCount != 1) : ?>
 order.setPaymentMethod('<?= $block->escapeHtml($currentSelectedMethod); ?>');
 <?php else : ?>
 payment.switchMethod('<?= $block->escapeHtml($currentSelectedMethod); ?>');
 <?php endif; ?>
 );
 </script>
<?php else : ?>
 <div class="admin__message-empty"><?= $block->escapeHtml(__('No Payment Methods')); ?></div>
<?php endif; ?>

I used data-validate="'validate-one-required-by-name':true"

But its not working in 2.2.6 , its working fine in 2.3.1.

Note- This issue is only coming with "Virtual Product".

please help