They'll probably aim for it after they get child sex transitions fully normalized. You can foresee the language they'll use:

'If children can both consent to and have sex changes... just why exactly can't they both consent to and have sex?'

Making identity 'fluid' was a marvelous tool for alphabet people, since it allows them to skirt around obstacles like the age of consent. It is, for example, becoming increasingly easier for kiddy fiddlers to simply claim 'I'm truly a little girl trapped in a man's body, stop it with the ageist transphobia! There is no age difference, and even if there was, it's just a number!'. Terms like 'Minor Attracted Person'—obviously intended as a replacement for the much more taboo term 'pedophile'—are not becoming increasingly prolific for no reason.

It's getting exceedingly difficult to think of any form of sexual deviancy that isn't legal, even more so any form that won't be legal by the end of this decade or so.

Those illustrations are so clownish and crude to the point of hilarity. Try picturing the kind of 'person' who drew them. We should all thank our lucky stars we grew up before this really began unfolding.