src/view/frontend/layout/catalog_product_view.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>
<referenceBlock name="product.info.addtocart"
template="IntegerNet_AddToCartGraphQl::catalog/product/view/addtocart.phtml">
<block name="product.info.addtocart.js"
template="IntegerNet_AddToCartGraphQl::catalog/product/view/addtocart/js.phtml"/>
</referenceBlock>
</body>
</page>