so right, I’d rather not explain the rashi explicitly here, because I don’t think it’s appropriate for this forum. But I will say that Rashi comments on the fact that the pasuk describes Rivka as a “besulah” and also notes “v’ish lo yada”, and explains why the language in the pasuk is not redundant as it might seem at first glance.
Reading this commentary makes it clear that tznius was definitely not a given for the local girls/ women in that time.