Hi, yes, the "read more" option is not available in Minifrontpage Pro as it is considered a bad practice for several reasons, such as SEO. However, you can add it if you want through template override.
Please follow these instructions if you don't know how to perform template override:
Then, add this code:
<a href="<?php echo $item->link; ?>" itemprop="url">Read more</a>
after this part:
echo JHtmlString::truncate(strip_tags($item->introtext), $introtext_truncate);
</p>
Hope this helps!