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.
The problem with that whole situation is the way the law is written the developer is the one held responsible if a child circumvents the check to access adult content. Therefore, developers will have to pay hefty fines unless they:
-1: Have a way to positively make sure the person enters their age is telling the truth; and
-2: Lock this value from being changed by the user afterwards.
Or: Region lock the OS.
One can see how incredibly problematic this is for both privacy and true ownership and control over your own machine. There is also a lot that needs to be figured out in the law such as what will happen when someone inevitably finds a way to hack the system to circumvent it, especially the region lock. Ultimately, big tech has deep pockets and can shrug off the fines but small nonprofit open source projects will be killed by them.
This law is specifically designed to kill nonprofit-run and private software like Linux.
All of this seems impossible to enforce in the FOSS ecosystem. People can just fork the software and remove any restriction they don’t like. That’s kind of the whole point of free software. Users are free to use their devices however they like, including in ways that are not intended by the devloper.