Friction is the problem with something like this. If my kid grabs my phone, or uses the LG TV Youtube App, or the Apple TV app, or the PlayStation 5, can all of those default to KidScreen?

If it can't solve all those, there's absolutely no utility for me. If I were willing to become the kind of authoritarian taskmaster that tightly controls which devices my kids use to watch something at all times, I would already not need KidScreen.