Comments entry when there are no posts even

The documentation says:

Comments – Created, Approved, Unproved, Binned, Unbinned, Spammed, Unspammed, Deleted

I have the plugin on a WP/Woo site where there are no comments as there are no posts, however I see lots of entries with the topic comment. The meta of the entry is Subscriptions, which is a Woo extension.

https://woocommerce.com/products/woocommerce-subscriptions/

Is that normal?