WP Social Ninja
A multipurpose plugin like WP Social Ninja has a wide range of features and one of them is the All Reviews option. In this section, users can experience a lot of features.
First of all, users can Edit, Delete or Duplicate any reviews from the this section.
Second is the Add Review button. here a user can manually add any review and customize it.
If a user doesn’t use any particular platform then from All Reviews they can add the custom review.
Moreover, sometimes if a user feels they don’t have sufficient Social Reviews in that case they can add reviews and the platform as well.