The government wants prosecutors to investigate X, Meta and TikTok, adding to a growing clash between the U.S. and Europe over regulating social media.

Meta and YouTube are in court this week over allegations that their social media platforms can be addictive and harmful to children, while TikTok on Tuesday chose to settle the closely watched case.

A group of YouTubers who are suing tech giants for scraping their videos without permission to train AI models has now added Snap to their list of defendants. The plaintiffs — internet content ...