Mate your talking about a N-Line not an i30N which is a different car thru ECU function, power train and suspension.Sorry to bring up this old topic.
I have a 2019 i30 Fastback N-Line and I’m only able to close the windows with the keyfob. Went to the official Hyundai dealer and they check and they say opening the windows is no feature. They checked it and told me that they only saw the close feature.
Is that even possible that only of the 2 options are available?