"Hard news doesn't sell" -- or, in the modern world, it doesn't get clicks or viewers.
So pretty much everything that is important is under-reported. Climate change, government corruption, corporate crime, etc. etc. A lot of that stuff is very dry in the mind of the general public, and "young girl kidnapped" or "puppies or rollerskates" just make more money.
Since you asked for something technology related, I'd say the danger of AI, the debate between solar/nuclear energy for the future, the high human/environmental costs of low-price hardware (mobile phones mostly)... pretty much anything is getting under-covered.