WordPress Custom Fields with if logic

I have a custom WordPress field named “post_display_breadcrumbs” which is a boolean, registered through custom.php.

I want to access it in my single.html to hide a <div> if post_display_breadcrumbs is false.

Here is what I currently have which does not work:

<div cms-function="code" cms-function-type="style" cms-function-code="get_post_meta( get_the_ID(), 'post_display_breadcrumbs', true ) === false" cms-function-style="display: none;">
    <div class="breadcrumbs mb-3" cms-breadcrumbs="categories" cms-breadcrumbs-item="> a:nth-of-type(1)" cms-breadcrumbs-separator="> span:nth-of-type(1)" cms-breadcrumbs-last-item="> span:nth-of-type(3)" cms-breadcrumbs-last-item-name="> span:nth-of-type(3)">
        <a href="#">Link 1</a>
        <span>&nbsp; &raquo; &nbsp;</span>
        <a href="#">Link 2</a>
        <span>&nbsp; &raquo; &nbsp;</span>
        <span>Last Link</span>
   </div>
</div>

Ideally what I would like to do is check if post_display_breadcrumbs exists & is true (1), then display the <div class=”breadcrumbs”>.

I ended up just putting the PHP logic into the single.html

<?php if ( get_post_meta( get_the_ID(), 'post_display_breadcrumbs', true ) ) : ?>
<div class="breadcrumbs mb-3" cms-breadcrumbs="categories" cms-breadcrumbs-item="> a:nth-of-type(1)" cms-breadcrumbs-separator="> span:nth-of-type(1)" cms-breadcrumbs-last-item="> span:nth-of-type(3)" cms-breadcrumbs-last-item-name="> span:nth-of-type(3)">
    <a href="#">Link 1</a>
    <span>&nbsp; &raquo; &nbsp;</span>
    <a href="#">Link 2</a>
    <span>&nbsp; &raquo; &nbsp;</span>
    <span>Last Link</span>
</div>
<?php endif; ?>