Hi @Tiago,
Thanks for sharing your question with us!
Yes, you can definitely change the display of the BIS modal to also display the product’s color and size. As long as the variant information is available, all you will need to do need to pull the product color and size is to adjust the backend of the BIS code snippet. However, if you’re using a custom theme for Shopify and not a a supported, free theme in our documentation list, neither Support nor Community can help troubleshoot how to create the specific code for you as custom themes don’t respect of backend installation of the BIS feature.
However, if you don’t feel comfortable custom coding yourself, I would reach out to your developer or connect with one of our Partners or Champions, who would be more than helpful to help build this out for you!
Thanks for participating in the Community!
-Taylor