Does this help at all? It shows how you can enable Live site editing, this way you can go to the blog post and moderate, but otherwise if it doesn't show in the Comment, you may need to do a report perhaps to join the Blog_Comment 's CommentPostDocumentID to the CMS_Document DocumentID and grab the info you need.
https://docs.kentico.com/display/K9/Allowing+users+to+moderate+blog+comments+on+the+live+site
To create reports, use this:
https://docs.kentico.com/display/K9/Creating+reports
And create a report using this query.
Select Doc.DocumentNamePath, Blog.* from CMS_Document as Doc
INNER JOIN Blog_Comment as Blog on Blog.CommentPostDocumentID = Doc.DocumentID