Add to Cart button display

Hi,

I have all the modules working fine. Only issue I am facing is, when the Product nodes are created it includes all the details I specify (Image, Description, Price with currency), however, it does not include the add to cart button.

I have verified if the Product Variations are enabled & being displayed under the operations.

However, it still does not appear in the product node, which by the way, were created using the feeds importer.

Please let me know, what am I doing wrong or what am I missing?

I am no developer, please let me know in a layman's language.

Thanks for the help.