Facebook Shop , Instagram and Shopify Checkout. Adding multiple products at checkout?

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Is the option of adding multiple products at checkout when a customer is using Facebook Shop and redirected to Shopify in the works?  Checking out with just the one product type is really limited for our customers and the terrible buying experience.  Do we have the same issue with Instagram?  Example if we tag a product using Instagram linked to Shopify, Will it also limit at checkout only 1 product type?