Limitations

Up to now Socialmeta is only compatible with Joomla articles (com_content) and FLEXIcontent items (com_flexicontent). It only implements 2 objects from the open graph protocol: article and video.
If you are looking for an open graph solution for implementing the product object type to your ecommerce (that would be an extremely wise decision by the way), you should have a further look to the JED