Anecdote here: I was talking to a college student who hadn’t heard about the whole Cambridge Analytica to-do. Why? She uses Facebook to check the news, and unsurprisingly it wasn’t coming up on trending news.
That is the whole issue, using one source for news when knowing any source has a percent of bias. Only way around the issue to keep an open mind and actually view new sources that you might or might not like to get a whole picture.
Don't like CNN nor FOX but still skim them for news, articles not TV nor videos.
Is your friend into tech news a lot? If not maybe that's why it wasn't shown. The only people I know who care about this story are tech people.