Hi,
Like other Joomla components, HikaShop menu items are displaying in the Joomla content area, also known as main or component area, also used for system messages.
Many templates, JoomlaXTC among them, come with this component area deactivated for their homepage by default. So, you should look into the template framework settings (Joomla backend -> Extensions -> Template Manager -> JoomlaXTC frontend template -> Options), and find the parameter to activate the component area (or whatever they call it) for the homepage.