Honestly, I don't picture this happening. The main problem is parents parking their kids in front of screens or devices with internet access and then just bailing. Most devices have the means to do this and have so for a long time, it’s called “parental control”. It’s been a thing since the late 90s in my experience and probably earlier. The problem is it requires some time/effort to set up. I’m not advocating for the digital ID solution to this problem necessarily, just to be clear. However, even anti virus suites have this ability, routers have this ability, hell even browsers do if I recall but people and parents have been hands off about it.
Now they are complaining and expecting the entire internet to change or blaming online porn companies. The alternative is realising that letting kids have unfettered and unmonitored access to the internet, the place where you can easily view graphic footage of people dying, is actually a bad idea; bordering on neglect. Though this ignores places like Tik Tok, YouTube and a lot of social media marketing their platforms as “kid friendly” when they’re anything but, probably a different discussion however.