I think it can easily be done if you have core SEO knowledge. If you want your subcategories to be featured under your main category & under your subcategory, the products will be shown. For instance, https://xyz.com/maincategory/subcategory/product. If this is what you’re looking for them you can create a main category and sub-category from the products option — categories. Each product of you can easily be added there. I did the same thing in one of my online clothing store.
