marty-harty Hi
Our K2 to com_content migration supports to transfer K2 content such as: categories, k2 items, fields, fields groups, ... into Joomla articles categories, articles, fields, ... accordingly. Unfortunately, Joomla doesn't have built-in comment system so our extension doesn't support this feature.
You can contact the provider of the comment extensions to find the way to import K2 comments to their extensions.
Regards