When you view the Theme live demo, on the Megamenu you will see all swatch types of products in the image below:

In this article, we will show all styles of the product swatches, so you can choose to use the swatch types that you wanna use so easily!
Go to Product page > Product Main > Product Form > Product Swatch option to configure the swatch types, please follow this video:
It will show the color swatches in product items on homepage/collection page/etc..
Go to Theme settings > Product Items > COLOR SWATCHES

To show Size list:

You need to follow this guide to configure your own colors to the swatches.
The color swatches only work when the variant name is Default: "Color, Colors, Couleur, Coloure".
If the primary language of your theme is not English, or you are using multi-languages, example: English and German. You need to add the variant name for other languages.
Please follow this video: