a) Her height is not that much of an issue tbh, she's still considered tall but it's nothing extreme. Also their species are taller than humans on average.
b) It's a bit more complicated that that (I also need to write a proper lore for all of this), but basically you are allowed to have a cybernetic part for medical reasons, but certain rules apply for it too. People who have cybernetics like this are still kind of wary of putting it on display so it's mostly hidden under artificial skin/fur, or in Maia's case she covers it with clothes and only doctors and people she's close with know about it