I hope you are well today, and thank you for your question.
The plugin searches posts and pages by comments, but doesn’t display an extract of each comment concerned because the search results page is displayed by the search.php or search.html file of the theme that you are using on your site, so the plugin doesn’t control it.
You can display an extract of the comment and link the results directly to the comment with an anchored link by developing custom code in the search.php file of your child theme by contacting the theme author or consider hiring a developer to develop it for you. You can hire a developer from any freelance site or WordPress agency.
You can also consider hiring me to develop it for you using the form https://ivorysearch.com/custom-work/
Best Regards,
Vinod Dalvi