Hello Vincenzo,
Thank you for interesting in our EShop Shopping Cart extension. Currently, we turn the catalog off on our demo site so you can not see it. If you want to use the your store in the Catalog mode, then you just need to go to the configuration of EShop to turn Catalog mode on, then all of shopping cart functions will be disabled.
You can read more about it here:
eshopdocs.joomservices.com/general-tips/enable-catalog-mode
Hope that this is useful.
Sincerely, Giang