can’t find a page’s template

i am trying to change the “READ POST” buttons’ text to say “READ MORE” here and it shows the same on other category pages.

i am having trouble finding where to do this? wouldn’t it be on the category template? this theme doesn’t have a category.php, but it does have an archive.php in which i can’t find evidence of this button.

am i looking in the right place? in case it helps, i’ll paste in archive.php.

<?php if(isset($_GET['ajax']) and $_GET['ajax'] == 1):?>
    <?php while (have_posts()) : the_post(); ?>
        <?php get_template_part('blocks/content', get_post_type()); ?>
    <?php endwhile; ?>
    <?php $link = get_custom_next_posts_link('view more posts')?>
    <?php if($link):?>
        <a href="<?php echo $link; ?>" class="next-href">view more posts</a>
    <?php endif;?>
<?php else:?>
    <?php get_header(); ?>

    <div class="subnav toppo">
      <ul>
<?php

$category_id = get_queried_object_id();
$args = array('child_of' => 392);
$categories = get_categories( $args );
foreach($categories as $category) {

  if ($category_id === $category->term_id) {
    $addedClasses = 'current';
  }
    echo '<li class="' . $addedClasses .'"><a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category->name ) . '" ' . '>' . $category->name.'</a></li>';
    $addedClasses = '';
}

?>

      </ul>
    </div>

    <div class="heading blog-heading" style="background-image: url('https://csazcontent.wpengine.com/wp-content/uploads/2018/03/header-730.png');">
        <?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
        <?php /* If this is a category archive */ if (is_category()) {

if ( post_is_in_descendant_category( 392 ) ) {
    // do something
  ?>  <h1 class="inset-header">Policy & Data</h1> <?php
} else {
  ?> <h1 class="inset-header"><?php single_cat_title(); ?></h1> <?php
} ?>

        <?php /* If this is a tag archive */ } elseif( is_tag() ) { ?>
        <h1><?php printf(__( 'Posts Tagged ‘%s’', 'collegesuccessarizona' ), single_tag_title('', false)); ?></h1>
        <?php /* If this is a daily archive */ } elseif (is_day()) { ?>
        <h1><?php _e('Archive for', 'collegesuccessarizona'); ?> <?php the_time('F jS, Y'); ?></h1>
        <?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
        <h1><?php _e('Archive for', 'collegesuccessarizona'); ?> <?php the_time('F, Y'); ?></h1>
        <?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
        <h1><?php _e('Archive for', 'collegesuccessarizona'); ?> <?php the_time('Y'); ?></h1>
        <?php /* If this is an author archive */ } elseif (is_author()) { ?>
        <h1><?php _e('Author Archive', 'collegesuccessarizona'); ?></h1>
        <?php /* If this is a paged archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
        <h1><?php _e('Blog Archives', 'collegesuccessarizona'); ?></h1>
        <?php } ?>
    </div>

    <div class="container main-content-container">

        <!-- <div id="content" class="mod"> -->
        <div class="mod">
          <p><?php echo category_description( $category_id ); ?></p>

            <?php if (have_posts()) : ?>

                <div data-ajaxholder="posts">
                    <?php while (have_posts()) : the_post(); ?>
                        <?php get_template_part('blocks/content', get_post_type()); ?>
                    <?php endwhile; ?>
                </div>
                <?php $link = get_custom_next_posts_link('view more posts')?>
                <?php if($link):?>
                    <div class="more-box">
                        <a href="<?php echo $link; ?>" class="button" data-ajaxlink="posts">view more posts</a>
                    </div>
                <?php endif;?>

            <?php else : ?>
                <?php get_template_part('blocks/not_found'); ?>
            <?php endif; ?>
        </div>

        <!-- <?php get_sidebar(); ?> -->
    </div>

    <?php get_footer(); ?>
<?php endif;?>

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