The PeepSo About Author output is not present in the JReviews listing detail pages by default. If you want to add it back you can use the following code snippet in the listing detail page or even in the php output format of a banner custom field.
echo PeepSoTemplate::exec_template('blogposts','author_box',
['author' => PeepSoUser::get_instance($listing['User']['user_id'])],
true
);
You can also add the code after the listing description without template customizations using a JReviews action hook:
Clickfwd\Hook\Action::add('template_listings.detail:after-description', function($instance, $listing)
{
echo PeepSoTemplate::exec_template('blogposts','author_box',
['author' => PeepSoUser::get_instance($listing['User']['user_id'])],
true
);
});