Can you please describe your query in more detail? More navigations menus mean, do you want more menu items on the main menu or do you want to add a whole new menu on the theme. It’s is not possible to add a whole new menu. There are only two menus on the theme one is at the top bar and one is the main menu. If you want to add a menu in the sidebar it can be done using a widget.
On a specific page, I want to add more submenius links that will not be visible on all pages like Primary Sidebar or Footer. In this case I add more content specific to a subject which is not visible from the front page or main menu. Thank you for your replay
Yes, you can achieve it by adding a custom navigation menu code on a particular page using a custom HTML block. Also, you need to add all the CSS in Additional CSS
necessary for a custom navigation menu.
if you get any confusion while doing it, please let us know