Shopify Variants

Hello, Is there any documentation on adding Shopify variants? I am trying to get a build where Make fires and has Shopify to create 1 product with 1 option (Size) and 3 Variants (S, M,L) I am pulling the data from a Google Sheet. My current build is Watch Row (Google Sheet) → Open AI (Description, Title) → Update Row _> Create Product. I can successfully do a single product with no variants.