As TikTok, the world’s most popular app, comes under increasing scrutiny in response to data privacy and security concerns, lawmakers in the west may soon set their sights on other Chinese platforms that have gone global. TikTok was built by ByteDance as a foreign version of its popular domestic video-sharing platform, Douyin. But it is far from being ByteDance’s only overseas moneymaker. The Chinese company owns dozens of apps that are available overseas, many of them English-language versions of Chinese offerings. CapCut is a video-editing app that is used by TikTok creators, while Lark is a workplace collaboration platform. Other...