Export comments together with pages
Because history of comments is critical when exporting the project to client.
The reason comments don't export is because they were thought out as a means to thoroughly debate the project in all of its aspects before reaching its final form.
A workaround for this is to invite the clients as collaborators with viewing rights and have them perhaps contribute to the development of the project before exporting it.
Hope this helps!
Stefana from Moqups