This article is just a hit piece on social media. The cited research doesn't point out causes. The article does speculate on causes other than social media[0],

This article is just a hit piece on social media. The cited research doesn't point out causes. The article does speculate on causes other than social media[0], but only sandwiched between blaming social media. [0] - "The report does not reveal the causes of the changes, but they come amid increasing concern at the impact of rising social media use, income inequalities, the housing crisis, and fears about war and climate change on the happiness of children and young people."