My 2018 didn't have the little 'toot toot' horn for pedestrians. I spent days looking for it...turns out they removed it from Gen 1 to Gen 2.
Indeed they did, replaced with the whoosh noise maker instead.
Fun fact, on the 2011 model years you had to flash the highbeams to get the pedestrian horn to activate which was problematic in other ways as oncoming vehicles would take it as an indication to turn in front of you and that sort of thing- on 2012 through 2015 they added a button to the end of the signal stalk instead.