There is not an easy solution we can post here.

Currently, we have paid plugin customization and custom addon development services at the gVectors Team. They can assess the work and create it for you. Just contact us via salesgvectors.com email address and send a list of requirements you'd like to have.

The shortcode must include the post ID to function correctly, especially if it's being displayed on an archive page. Otherwise, it will attempt to retrieve data from the global post, which may not be correct.

Hier the code for example for the software category.

function add_shortcode_to_posts_in_category($content) {
    // Überprüfe, ob es sich bei dem aktuellen Post um einen in der Kategorie 'software' handelt
    if (is_single() && has_category('software')) {
        // Dein Shortcode, den du zum Inhalt hinzufügen möchtest
        $shortcode = do_shortcode('');
        // Hänge den Shortcode an den Inhalt des Posts an
        $content .= $shortcode;
    }
    // Gebe den geänderten (oder unveränderten) Inhalt zurück
    return $content;
}
// Füge den Filter zum 'the_content' hinzu
add_filter('the_content', 'add_shortcode_to_posts_in_category');

Here is the code: 

echo do_shordcode('')

Yes it is. 

Is that the right shortcode for this?

If you're using the Post Rating Based on Comment Rating Field you can use this shortcode: https://wpdiscuz.com/community/f-a-q/wpdiscuz-shortcode-2/#post-10665

However, if you're using the Stand-alone Post Rating, unfortunately, there is no available solution at the moment.