A new generation of Chinese apps aims to become a global phenomenon like TikTok without a bruising fight for space in the domestic market. StarMaker lets users create and share self-made music videos. The karaoke video app, which first gained traction in Southeast Asia and the Middle East around 2018, now boasts over 240 million cumulative registered users. “In 2021, we ranked first in music app downloads across 26 nations,” an executive for Kunlun Tech, the developer of StarMaker, told investors in April. “In 2022, we’ve remained dominant in Southeast Asia, northern Africa, and the Middle East, and we are...