Dozens of U.S. states, including California, New York, Arizona and Indiana are suing Meta Platforms Inc. for harming young people’s mental health and contributing the youth mental health crisis by knowingly designing features on Instagram and Facebook that addict children to the platforms.
There are plenty of information and even research onto the deliberately addictive design of Facebook.
Link: https://www.sciencefocus.com/future-technology/trapped-the-secret-ways-social-media-is-built-to-be-addictive-and-what-you-can-do-to-fight-back
There are more and better articles out there that I have read but this is one that I can find right now.