I need to add a custom parameter/segment to the post URL.

For example, when I have a post at example.com/post-name, I need to add another segment like example.com/post-name/places. After that, I need to add a dynamic segment like example.com/post-name/places/dynamic-value.

I can’t use ?key=value parameters, it needs to be segmented. I’ve tried to work with add_rewrite_rule(), but it doesn’t seem to work.

How can I achieve something like that?