How Can I Fix hentry Errors on Blog Page

I am using a child of an older version of the Colorway theme.

I am trying to fix hentry errors in the Google Search Console for my wordpress blog.

Specifically, the errors indicate that I am missing the: author, entry-title, and updated markup for the homepage.com/blog and homepage.com/blog/page/X/ portions of the site.

Here are my two options for fixing and the questions related to each option:

1. If this has been handled in an updated version of colorway theme, I would like to update but also keep the changes I have made in my child version of the theme.
Can anyone confirm that this has been fixed in the latest version of the Colorway Theme?
How can I update then apply the customization I have made?

2. I have found some recommended code to add to the following sections of code within the theme:

<?php the_author(); ?>

<h1 class=”entry-title”>The Title</h1>

<?php the_time(); ?>

However, since this is specific to each theme, I am uncertain in which files I need to make these updates/modifications. The recommendation suggests that these would be found in either the page.php, single.php or the archive.php.

Is anyone familiar with which files need to be modified and how to make this work?