This is Rae from Shopify.
Thanks for reaching out with this question, and welcome to the Shopify Community!
At this time, Instagram Shopping is only available for businesses in these locations, which are determined by Instagram. Since Barbados isn't on this list, I recommend contacting Instagram directly by following these steps, and submitting a request to have Barbados added as an eligible location.
I know Instagram can be an important tool for businesses, so I'll pass this feedback along to our teams here at Shopify, too. With this in mind, can you tell me a bit more about how you were hoping to use Instagram for your store? That way, I can share your specific use case and thoughts with our teams directly.
In the meantime though, there are some other useful ways that merchants can promote their Shopify stores with Instagram, such as:
Let me know if you have any other questions or concerns about this!