I want to add color swatches to my product page but main-product.liquid does not show up in my theme code under sections. Is there another section in the theme code I can use to add color swatches?
What theme are you using? As you said, the “main-product.liquid” code should be available to you under the Sections in the Dawn theme (for example.) Does your product page still work on your theme? If you’re missing the main product liquid file then your products page should be blank, or you’ve assigned a different theme file to your products. You may have to investigate for a bit first.