Hi,
HikaShop has an option to display or not the add to cart button on the products listing.
When that option is activated, you'll get an add to cart button on the listing for each product. However, if the products have variants, it's not possible to display the add to cart button (as the user has to go to the product page to select the characteristic before adding the product to the cart), and thus, HikaShop displays a "choose options" button which directs to the product page instead of the add to cart button.
There is also a link to the product page on the product name and the product image.
But there is no button you can activate to go to the product page all the time. That would require editing the listing_img_title file of the product view via the menu Display>Views and add custom code to display such button.