I don't like this but don't have another solution other than the porn industry self-policing which isn't promising.
For example, on Discord, all your messages are scanned for such. On Cloudflare as well (for over 5 years).
For now it means they have no interest to remove such content unless coerced or affected by the public opinion.
This would destroy all content though, not just for minors.
Absurd, but it works, in North Korea (death penalty), Iran (death penalty), China (10 year prison), and also protects victims from rape, or "rape" under financial pressure.
The alternative is to let responsibility of the parents to install web filter to their kids, and let others live freely on the internet, without sharing their history or IDing them.
In reality, TikTok also has really traumatizing content, yet is engaging tons of kids and teenagers, and IDing won't solve that, but good parents can.