If a product has two different sets of variations for example Select the Color and Select the Size, this API call only returns the different color variations.

Example ASIN: B07D2Y91LS returns this: https://gyazo.com/4f5fce8bfa8b89dc009d833496ff6727

These variants are just for selecting the color. If you search the product on Amazon you’ll see you have to select both the color and the size. I replicated this for multiple products.