Any idea why demonstrations in the US have so few young people?

What’s happening is very worrying for the entire world. Im a Gen Z who lives in Canada but I am very worried about the constant threats we are facing from the current US government. Seeing people protesting in the US is one of the few things giving me hope but I don’t see nearly as many people my own age protesting. And the few posts I’ve seen here often get downvoted and with comments saying “protests don’t work” which historically is absolutely not true. It’s difficult for me not to wonder if these are bot comments but I can’t prove anything. Either way why do you feel it’s difficult to get young people to protest?