I see there was an older feature request post about a year ago indicating there was no way to add variants when creating a product using the Shopify connector. Currently, there is now way to add variants when creating a product but there is a create variant action.
The questions are 1) Are there any Shopify connector examples to create a product with variants? 2) The variant action does not have a way to add values to the variants. How to add values to variants?