Here’s a fun one. The blocking capability IS working on my son’s iPhone, but like all kids, they find ways to circumvent. I would hear my son in the bathroom watching youtube when I know and tested it was blocked. He was opening the messaging app, which allows you to upload files or attachments. One of the options to upload in Messages is YouTube. When you click the icon, it shows what videos you’ve watched most recently, and provides a search bar to search YouTube directly. And in screen time, the messaging app is essential to allow screen time to work. I limited him to 15 minutes of using the messaging app. Just hope he never needs to text me in an emergency situation. I’ll tell you, my kids are going to earn their doctorates in finding ways to watch youtube on anything with internet access.