I have added the following code to catalog_product_view.xml to show the SKU in the list of attributes inside the "More information" tab
<referenceBlock name="product.info.details">
<referenceBlock name="product.attributes">
<arguments>
<argument name="at_call" xsi:type="string">getSku</argument>
<argument name="at_code" xsi:type="string">sku</argument>
<argument name="css_class" xsi:type="string">sku</argument>
</arguments>
</referenceBlock>
</referenceBlock>
The other customizations in the file are visible, but not this one. Any idea?