Unfortunately Facebook doesn’t actually allow you to comment on Facebook posts outside of Facebook and so we’re not able to include that functionality in the plugin. The only way to comment on Facebook posts is within the Facebook platform itself. If Facebook changes this in the future then we’ll certainly add this to the plugin, but currently it’s not possible. The plugin does contain a ‘Comment on Facebook’ link in the comments box below each post to prompt users to comment on the post on Facebook.
