@lindsey.homenick 
To add page pagination on a custom Wordpress page, follow these steps:
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function custom_pagination() {
    global $wp_query;
   
    $pager = 999999999;
   
    echo paginate_links(array(
        'base' => str_replace($pager, '%#%', esc_url(get_pagenum_link($pager))),
        'format' => '?paged=%#%',
        'current' => max(1, get_query_var('paged')),
        'total' => $wp_query->max_num_pages,
    ));
}
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<?php custom_pagination(); ?>  | 
Now, when you view your custom Wordpress page, you should see the pagination at the specified location. The pagination will automatically adjust based on the number of pages in your query.