I want create a template file for sales->order->create new order.
In layout file(Xxx/Order/view/adminhtml/layout/sales_order_create_index.xml):
<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<referenceContainer name="billing_method">
<block class="Magento\Backend\Block\Template" template="Xxx_Order::order/create/billing/method/form.phtml" name="order_create_billing_form" as="form" />
</referenceContainer>
</body>
</page>
This is my core file Sales-module/view/adminhtml/layout/sales_order_create_index.xml
<block class="Magento\Sales\Block\Adminhtml\Order\Create\Billing\Method" template="Magento_Sales::order/create/abstract.phtml" name="billing_method">
<block class="Magento\Sales\Block\Adminhtml\Order\Create\Billing\Method\Form" template="Magento_Sales::order/create/billing/method/form.phtml" name="order_create_billing_form" as="form"/>
</block>rm" as="form"/>
</block>
form.phtml:
<div class="admin__field">
<label for="history_comment" class="admin__field-label">
<?= /* @noEscape */ __('Additional Comment') ?>
</label>
<div class="admin__field-control">
<textarea rows="3"
cols="5"
id="order-comment"
name="order[order_comment]"
class="admin__control-textarea"></textarea>
</div>
</div>
My template file isn't showing after reloading page.