pashute yid,
firstly, it sounds like you know the gemara and shulchan oruch off by heart.
second, tzniyus issues are everywhere, and yes that includes the ‘iyr hatorah’ (aka. lakewood). yes, when people do come to Lakewood, for instance for a shabbos, they’d dress with sensitivity, because lemaysa in actuality their in Lakewood.
thirdly, what do you mean? are you saying tzniyus is not the main issue for a woman?