This reads suspiciously like yet another endeavor to mandate digital ID for Internet usage.

There is no need for age verification on the server side. Parents of small children can handle it assuming minor changes or reverts to devices and some apps. The server or CDN need only let the client know it may contain adult and / or user generated content via one simple header. [1][2]

Not perfect, nothing ever is nor ever will be. Also never try to block teens, that is a foolish losing battle.

[1] - https://www.rtalabel.org/index.php?content=howtofaq#single

[2] - https://news.ycombinator.com/item?id=43784936