how can I retrieve a comment reply notification which I haven't seen?
Did JuanMata answer your question?
Or did you also miss some of the comments after doing that? The chance is some comments are in appropriate and deleted, you will still receive notification but can not view the deleted comments anymore
actually there was a time when I wanted to check whether any reply to my comment. I saw that red chat symbol and I clicked it. Yes there was a list of comment replies but accidentally I clicked something before I open any of those comment reply notification. then I was brought to a page but I clicked back button directly. Sadly those notifications did no longer exist. :(