Fake AF, there isn’t any post with reverse genders on the subreddit.
The AITAH people are nothing if not weirdly observant of what happens on that sub. This would be caught immediately
The text is probably made up, but people have done such swap posts several times before and got similarly opposite results. Usually the posts get removed from the sub when someone eventually notices the deception, but you can still read them if you have a link. It’s a very toxic sub.