I wondered about that in my 2018 Sonata also.Yep my previous Chrysler did the same - with the fob and uConnect app. I'm a little disappointed to hear that option for seats still isn't available with Bluelink. I'm not sure why Hyundai refuses to add that functionality. Auto on comfort is the option for the seats to come on automatically. It was on the 2109, but they removed it for 2020.