Hello,

Please open the Screen Options in the right top of the screen in Appearance > Menu, you will see Product categories, enable them, you will be able to create your menu using Product categories.

These two articles may be useful for you:
https://xtemos.com/docs/woodmart/product-category-menu/ and https://xtemos.com/docs/woodmart/adding-menu-site/

If you have any questions please feel free to contact us.

Best Regards