How can children be protected?

Many of us were exposed to pornography in our youths, and every year it is becoming more accessible and perverse. We know it has infiltrated apps like tiktok and instagram. What can be done to protect the next generation? Porn blockers don't work. They ignore many sites/apps and can be bypassed with VPNs. Short of legislation, what can you think off to protect children? Even those whose parents aren't aware or simply don't care.