Governments globally have raced to ban teenagers from social media in recent months, from Australia to the U.K. Meanwhile, teenagers are increasingly becoming dependent on AI chatbots, echoing a familiar problem with social media in the 2010s. Digital safety experts told CNBC that legislation around child safety and AI chatbots is still woeful. This report is from this week's The Tech Download newsletter. Like what you see? You can subscribe here. Hello and welcome to this week's edition of the Tech Download. We're doing things a little differently today! I'm Sawdah Bhaimiya, business news reporter and CNBC's resident Gen Z and social media expert. Taking over…