How to increase cross-sell products display limit in magento 2?

You need to override Magento/Checkout/Block/Cart/Crosssell.php file.

Create Vendor/MyModule/etc/frontend/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Checkout\Block\Cart\Crosssell" type="Vendor\MyModule\Block\Checkout\Block\Cart\Crosssell" />
</config>

Create Vendor/MyModule/Block/Checkout/Block/Cart/Crosssell.php

namespace Vendor\MyModule\Block\Checkout\Block\Cart;

use Magento\CatalogInventory\Helper\Stock as StockHelper;

class Crosssell extends \Magento\Checkout\Block\Cart\Crosssell
{
    public function __construct(
        \Magento\Catalog\Block\Product\Context $context,
        \Magento\Checkout\Model\Session $checkoutSession,
        \Magento\Catalog\Model\Product\Visibility $productVisibility,
        \Magento\Catalog\Model\Product\LinkFactory $productLinkFactory,
        \Magento\Quote\Model\Quote\Item\RelatedProducts $itemRelationsList,
        StockHelper $stockHelper,
        array $data = []
    ) {
        parent::__construct(
            $context,
            $checkoutSession,
            $productVisibility,
            $productLinkFactory,
            $itemRelationsList,
            $stockHelper,
            $data
        );

        $this->_maxItemCount = 8; //put ur limit here
    }
}