Custom category listings

WordPress automatically creates an archive for each category. If you look in wp-admin, under Posts > Categories, you can click “view” to view a category and that will show you what it looks like and what the URL is.

It is possible that a theme could override this functionality, but it’s unlikely. Most themes have a template to display this type of automatically-created page – either a category.php specifically for categories, or an archive.php which covers not only categories but other archives.