Indonesia’s attempt to keep children aged under 16 off social media platforms deemed high risk has quickly become one of the world’s biggest tests of online safety regulation, with more than 4.8 million suspected underage accounts removed or deactivated in the first three months of enforcement. For President Prabowo Subianto’s government, the figures are an early sign that major platforms are falling in line with its policy aimed at making the digital world safer for children. Communications and...