Displaying custom fields for custom post type generate with Custom Post Type UI Plugin

It depends on how you added the custom fields. If you used a custom fields plugin, you may be able to call a plugin-specific function. For example, with ACF, you can call get_field('fieldname') to retrieve one specific custom field.

If you’re not using ACF (or even if you are), as long as your fields are stored as postmeta, you can do something like

<?php
if(get_post_meta($post->ID, 'quality_score', true)) {
    echo get_post_meta($post->ID, 'quality_score', true);
}
?>

or format more heavily, i.e.

<?php
if(get_post_meta($post->ID, 'quality_score', true)) {
    $quality_score = get_post_meta($post->ID, 'quality_score', true);
    echo '<div class="quality">' . $quality_score . '</div>';
}
?>