damn, where do you find those? Most stories I've read people either turned into a girl/boy randomly without rhythm or reasons and definitely not what they want or even expect. (not counting the isekai story where the MC got turned into a girls for no reasons btw)
like this for example
Though most genderswap stories I read usually lean more onto the serious sides of things:
here (1) are (2) some (3) examples (4)
EDIT: actually, (3) is bodyswap but the whole "holy shit I'm now the opposite sex" thing is also there.
Also
this series is new but it handles the comedy and the seriousness of the situation quite well.