Edit the_category (); for a hierarchical display
You could assign the post only to the child category, and call the function like so: the_category( ‘ ‘, ‘multiple’ ); This will output (notice the whitepsace between the anchor tags): <a href=”https://example.com/category/parent/”>parent</a> <a href=”https://example.com/category/parent/child/” rel=”category tag”>child</a>