A comment on an item – for example, a comment on a blog post. The comment content is expressed via the text property, and its topic via about, properties shared with all CreativeWorks. The number of downvotes this question, answer or comment has received from the community.
1. First Go to WordPress dashboard -> Structured Data -> Settings -> Global -> General settings -> Check this “comments” option and click on the “Save Settings” like below the screenshot.

2. In the browser, this type of comment will display and generated schema markup.

3. In the source code, JSON schema markup will be added like below the screenshot.

That’s it for this tutorial!
We hope it helped you. If you have any feedback or questions or do you want us to create compatibility for any other schema type which isn’t listed in our plugin then you can request us we will surely implement it as soon as possible.
Just contact us here and we are always available for you.