Magento 2 mini cart mini shopping cart drop
https://devdocs.magento.com/guides/v2.4/frontend-dev-guide/templates/template-sample.html
<?php
$counter = $this->helper('\Magento\Checkout\Helper\Cart');
if ($counter && $counter->getSummaryCount()) {
echo '(' . $counter->getSummaryCount() . ')';
}