Hey so the page your looking at doesn’t have links and there is no hover effect. It’s only icons added and below that text. There is css to make the grid.
It sounds like you are wanting the icon menu (which is an option in the home page options) see here: https://themes.kadencethemes.com/virtue/ (near the bottom)
If you are trying to add an icon menu on a different page then your home page then there isn’t anything built into the free theme that will do this for you. (premium does have a specific shortcode for this).
So using the free you would need to use the theme columns or pagebuilder.
Then within each column add an icon and your text below. Then select all of it and add a link.
As for adding the hover thats could be done with custom css but you would want to give your links a class for better control.
Hope that helps explain.
Kadence Theme