In general, any proposal to use government ID for "age verification" over the internet is going to end in someone using it for mass surveillance, and it's probably not wrong to suspect that as the intention to begin with.

There is no benefit in doing that because parents already know how old their kid is. They don't need the government to certify it to them, and then they can configure the kid's device not to display adult content.

Involving government ID is pointless because the parent, along with the large majority of the general population, has an adult ID, and therefore has the ability to configure the kid's device to display adult content or not even in the presence of an ID requirement if that's what they want to do. At which point an ID requirement is nothing but a footgun to "accidentally" compromise everyone's privacy. Unless that was the point.