Thank you for the quick response. The option values appear on the footer of every page/post EXCEPT the archive.php template, which leads me to believe the problem is similar to this FAQ. I cannot figure out how to get this solution to work because I am dealing with option page fields + sub fields.
I think the code is fine, please see below.
<div class="section group">
<?php if( have_rows('footer_widgets', 'option') ): ?>
<?php while( have_rows('footer_widgets', 'option') ): the_row(); ?>
<div class="col span_1_of_2">
<h2><?php the_sub_field('heading'); ?></h2>
<?php the_sub_field('description'); ?>
<a href="<?php the_sub_field('button_link'); ?>" class="footer-cta-btn"><?php the_sub_field('button_name'); ?></a>
</div>
<?php endwhile; ?>
<?php endif; ?>
</div>
