Why is the add to cart button missing on mobile in the Narrative theme?

When someone is in my shop, they can add to cart if they are on a computer but the add to cart button is missing when on their phone. How do I add this back? I am using the Narrative theme.

@ashjoy - can you share the page link where you are facing this issue?

Yes, but remember it shows via computer but not on a phone. Magnolia | White Leather | Rubber Sole – The Humble Soles