Contra Haidt on the Teens

I was reading the Haidt piece on the kids, and he kept talking about major trends and statistics regarding teen suicide. I wanted to know how many deaths exactly a 131% increase in suicide entails.

*There are ~21 million kids aged 10 to 14, and their suicide rates increased by 1.4 kids per 100k from 2010 to 2021. There are also ~21 million kids aged 15 to 19, with an extra 2.5 kids per 100k unaliving.

So this is 294 extra deaths per year from suicide for the kids and 525 for the teens.  That's 819 extra suicide deaths per year. What percentage of this can we attribute to the phones?