I'll come in with a hot take on this. Whether a computer can predict these types of things should be interesting to computer scientists/software engineers only.

I'll come in with a hot take on this. Whether a computer can predict these types of things should be interesting to computer scientists/software engineers only.. Humans are very good at knowing who feels these things and or at least will be better than computers for the foreseeable future. For the most part the problem isn't knowing there is an issue with a child, the problem is getting the social, cultural, political, and individual will and skills to address it in a meaningful and productive way. Identifying the issue doesn't do a lick of good if we have no way to address it. This is, for the most part, the real problem. Have you talked to your kids about suicidal thoughts/mental health in a salient way that gives them space to approach it? More importantly, have you talked to them about how to talk to their friends who are having these problems? This is really the broader issue, mental health issues like suicide, addiction, and depression are solveable if and only if we are able to deal with the ugly discussions on a cultural and personal level. Singling broken people out by algorithm won't help us there.