since people fear being publicly shamed at for creating such content (people generally feel its blaphasme or something), it's kinda difficult tu come by.
I am not sure myself, since I haven't read PS. (the sole reason being because stories keep changing, making it feel like a concept (not even alpha), so...
I'm not sure what is going on there, but)
What I can say is that the fear of activists is kinda strong, especially as of late.
I heard shounen jump renamed a character because of something someone happened to notice (a possible link to an event in the past) and they succeeded.
Obscure writers are even more sensitive, making such content rare in general. (let alone, its against 4chan's rules to post probably for the same reason (otherwise the gov of their hosted servers probably go nuts or something).
Anyway, point is it's kinda rare to even find something like that.
unless its child swaps with child or within same family and usually for comedy.
I'd be surprised if someone writes about it...
I have to say, there are a lot of options considering content surrounding that. For example, a girl with an adult guy's personality could turn into a bully of her fellow school mates or something. (for something like revenge)
or, idk. (it doesn't need to involve above R rated stuff is what I am saying, but its still rare and unexplored in fiction as a subject seemingly)
It does have interesting possibilities I think, but yeah... people are basically being too sacred of their little children (who, more often than not end up bullying eachother and hurting them in extreme cruel ways in my experience, but adults ignore that.)
That reminds me, .... it may even be dangerous for the swapper to be in a child's body considering this, unless they remain mentally strong against it.