How do I include this field in a node template?

I would like to make this part of the "meta" content that is displayed before a typical drupal node, like 'Category | Date of Publishing | No. of Comments | xx mins read'. Currently, if I copy-paste the field code from the reading-time.html.twig file into a node template file (a node type for which the reading time is activated), I do not get any time displayed. Only my prefix, such as "read" is displayed in the front-end. The code I am using is

        <span class="post-comment"> 
          {{ reading_time }} read
        </span>

Please let me know if this is the correct way to display this field, or if there is anything I am doing wrong.

Thanks in advance.