I just came to know that android app users can copy comment's text:
Can we get such option in the iOS app as well? Currently there is only "Share" option which copy or send the comment permalink.
This will be available beginning in beta version 126.96.36.199.
You should now see "Copy" among the comment options.
In addition, comments that are copied will preserve formatting when pasted into applications that support it (e.g. Mail.app, Notes.app, etc).