newsupernova/app/code/WeltPixel/Quickview/etc/frontend/sections.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Customer:etc/sections.xsd">
    <action name="weltpixel_quickview/index/updatecart">
        <section name="cart"/>
    </action>
</config>