Meta are trying to avoid this kind of thing:
www.theguardian.com
So facing those kind of fines, and what it is already spending on age verification, it's obvious why it's striving to offload this burden to the OS.
Meta found in breach of EU law for failing to keep children off platforms
Commission says tech company does not have effective measures to keep under-13s off Facebook and Instagram
This type of legislation does not really take into account that there are OS's like the 'BSDs and Linux. For the legislators, an OS or a "vendor" or an "app store", is something like MS or Apple or Android, where there is some kind of account registered (not a UNIX user account, but a MS account, or Apple ID), and the account will hold this age verification data for applications and websites to query.The tech company Meta has been found to be in breach of EU law for failing to prevent children under 13 from using its Facebook and Instagram platforms.
Meta will now have the chance to examine the commission’s investigation file and mount a defence. If the finding against the Silicon Valley company is upheld, it could be fined up to 6% of its global annual turnover. Meta reported revenue of $201bn (£148bn) for 2025.
So facing those kind of fines, and what it is already spending on age verification, it's obvious why it's striving to offload this burden to the OS.