A Star Ferry boat crosses Victoria Harbour in front of a skyline of buildings in Hong Kong, China, on June 29, 2020.Tyrone Siu/Reuters It’s 8 p.m. in Melbourne, Australia, and Jane Poon is signing off for the day, handing responsibility for running The Points to colleagues in the United Kingdom and Canada. That the media outlet, founded last year, can “follow the sun” like this speaks to the ambition Ms. Poon and her co-founders have for The Points, one of several publications launched by Hong Kong journalists living overseas in the wake of a crackdown against the city’s once thriving...