I call shenanigans on this. Suicide rates are not a reliable signal for underlying mental health issues in isolation

Bullying via social media and group chats is endemic, and phones function as a massive signal amplifier in this regard.

Furthermore, there is a growing body of evidence which link early smartphone use to poor outcomes in social skills, degraded critical thinking ability, and elevated rates of depression.

This feels very much like someone picking data to fit their hypothesis.