Thank you for your responses.
I have followed both posts, and still am receiving the "The Blog" H1 on only some of my articles.
So here is what I have done:
1) Replicated the folder path so the files are in the same places (on both the X and Child X Themes)
2) Copied across the _brand.php and swapped out the h1s to "ps" following the article you linked to
3) Copied across the landmark-header.php from the parent theme to the child theme through this path "public_html/unrivaledreview.com/wp-content/themes/x/framework/legacy/cranium/headers/views/renew"
4) Changed the h1 tags in under the <?php elseif ( is_home() || is_single() ) : ?> condition to "p" instead of h1. So here is how it looks:
?php elseif ( is_home() || is_single() ) : ?>
<?php if ( x_is_portfolio_item() ) : ?>
<p class="h-landmark"><span><?php echo x_get_parent_portfolio_title(); ?></span></p>
<?php else : ?>
<p class="h-landmark"><span><?php echo x_get_option( 'x_renew_blog_title' ); ?></span></p>
So it seems to have worked for some of my articles, particularly the new ones.
But some of my older articles still have "The Blog" as H1 titles.
How do I remove this from the entire site?
Do i need to change any other instances of "h1" in the landmark file?