How to make part of the data paid?

Question

WordPress

I use ACF fields, I add code through the template page: Displaying a link to the cloud with my work. I need to organize a payment on the site and after which the hidden text became visible. All the actual solutions that exist (which I have seen) hide only what is possible at the time of adding the news and then using shortcodes. Using a shortcode in php does not work this functionality. What I need is a php-solution that I would place on the post page (sungle.php) Maybe someone came across a non-standard solution for organizing paid access or paying for hidden text?
<?php the_field( 'cloud' ); ?>