Hi @riz,
The CSV of the shape data associated with your Lucidchart document includes shape names, shape library, text fields, additional data, as well as comments in the document. You can also see the real-time status of a comment, the comment creator, associated timestamp, and the message included in the CSV.
Could you please try to export your document again in a private or incognito window and let me know if you can see the comments in the CSV? For help with opening an incognito window, please see this community post.
For more information, I highly recommend our Export or print a Lucid document article.
Please let me know if this works and if you have any other concerns! Cheers!