In case you already have a Facebook App and want it to use "manage_pages" and "publish_pages" permissions you will learn how to enable them in this article.
These permissions are needed for Facebook App to be able to publish posts on your Facebook Page. Once it is in the developer mode you can make any publications on the Facebook page through the Facebook App without these permissions.
However, being published while in the developer mode posts aren't seen to anyone except for the page administrators and Facebook App developers. That is because Facebook needs to confirm the manage_pages and publish_pages requests, to make them seen to the public.
In order to configure the auto-publication of your blog posts on Facebook in Magento 2 Blog navigate to Stores > Configuration > Magefan Extensions > Blog and find the Publish Posts On Facebook section. Note that this option is available for Blog Plus and Blog Extra users only.
1. Enable the Auto Publish on Facebook option to be able to configure it.
2. Set the Facebook App ID and Facebook App Secret. You need to get them from your Facebook API. If you don't have one, please create a new Facebook APP. Note that the application needs to be in the LIVE mode and
Magento Blog supports different kinds of comments including Magefan, Facebook and Disqus comments. In this article, you will learn how to configure them. In order to manage comments in Magento 2 Blog navigate to Stores > Configuration > Magefan Extensions > Blog > Post View and find the Comments Section.
Magefan Blog Comments
Set the NumberofComments of blog post to be displayed by default. In order to see more comments, customers will have to click on the See More button.
Specify the default Number of Replies to these comments to display.
Choose whether to Allow Guest Comments. In case you disable this option guests won't be able to submit a new comment or reply. To do this
Magento 2 Blog Plus and Blog Extra v2.9.1 has been released with new options to set the dates format and disable dates displaying. Please note that the options described in this article are available only for the Blog Plus and Blog Extra users. In order to configure blog dates displaying in Magento 2 navigate to Stores > Configuration > Magefan Extensions > Blog.
In the Design ( Blog+) section you can enable the Display Posts Publication Date and set the Posts Publication Date Format.