WASHINGTON — TikTok on Friday reached a $400 million settlement in a lawsuit brought by the Justice Department that accused the company of illegally gathering children’s information.The 2024 suit, filed under the Biden administration, claimed that TikTok had gathered data from users under the age of 13 without parental permission. The suit accused TikTok of knowingly allowing children to create accounts and of failing to honor parents’ requests to delete their children’s accounts.TikTok violated federal privacy law along with a 2019 agreement with the government in which the app promised to take steps to protect children’s privacy, according to the…