Instead of using the “Page Link” Field Type, use the “Taxonomy” Field Type instead, and select “product_cat” as the Taxonomy.
If you get the taxonomy by Term ID (rather than as Term Object) you’d need to output your link on the page like this:
<?php echo get_term_link( get_field( ‘featured_page_link’ ) ); ?>
The only issue with this method is if you’re using it in a Repeater, you can’t mix links to product categories with links to pages/posts.