If you can feel a very small tinge of existential horror when you read the words “try to”, congratulations, you’re a true *nix devotee.
If legislators get grumpy about this, just gently thwap them with your handy copy of The Unix Haters Handbook and tell them you’re working as hard as you can under the circumstances.
How is it uniquely identifying users if all that OS shares with programs is the age group? (that btw user chooses, can lie without problem)
The only real way to prove age is with legit ID.
Fingerprinting. Age, as well as factors like IP address, can be one more data point to individually identify a user with a certain number of accounts.
There’s also potential they changeover from “Enter your DOB” to “Show your driver’s license”, which they can collect much more data from.