Have these been removed since you linked them, or is viewing flagged comments some power I haven't figured out yet?
There's probably a karma limit to viewing flagged comments, since myself and the poster you're replying to have this ability and we both have >1k karma.
You can set "show dead" in your profile, no karma limit needed I am aware of.
Gamechanger, much gratitude to you!
Welcome! Having it activated is pretty eye opening at times.