You're on the right path, but the "something" politicians want to do is specifically "regulate Facebook's patent harms to children". Facebook's counter-argument is: "we don't have a legally ironclad way to check user age, it should be Apple and Google's job". So the politicians want to write a law to make it Apple and Google's job to check age.

In other words, all of these age verification laws are here predominantly to indemnify Facebook from a growing wave of child endangerment lawsuits in a way that will ensure Facebook doesn't have to kick off even a single teen from their platforms. That's why the "verification" is just a date and an age range bucket.

My personal opinion is that these laws are stupid, but not harmful to Linux users, and that everyone angry at systemd for complying is shooting the wrong guy. Your real target is Facebook and you should be yelling at your local representative to make this bill not target Linux distros.