This is likely because for many young people the only source of news is social media. And they are unlikely to be targeted to see the political ads.
Interestingly, occasionally I see political ads on Willow.tv which I use to watch Cricket. And most of these ads have Noem threatening to deport people ("if you are here illegally, we are coming after you..."). I am a US citizen.
on top of that, you need to register as a voter in many places and that process ends months before the actual ballots come. These aren't things they teach in most schools (nor their parents, apparently).
Interestingly, occasionally I see political ads on Willow.tv which I use to watch Cricket. And most of these ads have Noem threatening to deport people ("if you are here illegally, we are coming after you..."). I am a US citizen.