Comments firstly appear in an Admin listing "Aircraft Comments Manager " for consideration and approval. This is currently empty and I assume that you have checked each profile where the comment would normally appear at the bottom of the page. I cannot check without the respective registrations.
My guess is that your comment submissions may have been at the time of the recent site breakdown, were not therefore received, and would ask that you resubmit them.
Apologies on behalf of Admin.
Malcolm.