Simple plugin to add no-index to posts in a specific wordpress category.
NOTE: RANK MATH is REQUIRED for this plugin to work. Further, basic php knowledge is required to edit the required files. If you are not comfortable editing PHP files, please consult a developer. No free support is offered for this plugin.
To use:
Download the plugin and open the noindex-category-posts.php file in a text editor.
Edit the array on line 24, replacing 'your','category','here' with your required categories.
Save and upload the plugin as normal.
Activate the plugin.