Magento 2, Cross-sell product will be display in Shopping Cart page. By Native Magento, Only four Cross-sell product will be display in cart page. If you want to increase or decrease the Cross-sell Product display limit in cart page you need to modify Core Crosssell.php file.
Native file location for CrossSell Product, Magento\Checkout\Block\Cart\Crosssell
You can check the hardcoded product limit by protected $_maxItemCount = 4;
Thanks for the great tutorial! Unfortunately after following all the steps I get 2 errors on Magento 2.3.3. Only thing I changed was Rbj to Jcs to remember it better and made sure to change all references to Rbj to Jcs.
Exception #0 (MagentoFrameworkExceptionLocalizedException): Invalid block type: MagentoCheckoutBlockCartCrosssell
Exception #1 (ReflectionException): Class JcsCrossSellBlockCartCrosssell does not exist