Shopify's buy button is a great solution for designers who want-
Depending on your approach, the easiest angle is to create your products in the CMS ( not as Webflow ECommerce products ), and then create the same products list in Shopify.
You'll pull the Shopify product ID into the CMS and you can then create the Buy buttons dynamically.
If your products change often, you may need a more advanced solution to create your product lists and navigation.
Add this to your page's before-/body custom code area;
https://discourse.webflow.com/t/shopify-buy-button-not-showing-when-using-tabs/101447/12