How would it be breaking confidentiality to say what had been said about an anonymous child who is loosely connected to an anonymous username? If it is, then that has already been broken by mentioning him at all.
I am not saying you're lying (I don't do personal attacks) but I do wonder whether you may have got the wrong end of the stick, or misremembered some of the details, as they don't hang together.
A child might begin to develop gender awareness between 24 and 26 months, but that is different from being aware enough at 2 to fully understand the concept and know that they want to be the other sex, never mind insist on it to their parents, and know which things the parents are doing that contradict that desire.
I've been looking at playgroup photos from when mine were that sort of age, and most of the children are in tracksuit bottoms and tops, so clothing isn't much of a determiner. The favourite toys were those red and yellow pedal cars (Tonka?) and the large plastic kitchen - again, unisex. There were no boys' and girls' activities, it was all communal. I'm not sure how being one or the other would be a big deal, but who knows?
There are numerous differences between Dyslexia and trans issues, not least is the fact that adult dyslexics don't try to force themselves onto others, or threaten people with cancellation, rape or murder.