Parents are supposed to be parenting, without the help of the Government. You do not want your kid to spend their time on Facebook or Instagram? Do something about it yourself, as a parent. I understand that tech-illiterate people may be at a disadvantage here, but we are on HN and I am pretty sure we are able to:
Set up a Raspberry Pi (or any other SBC, or even an old x86 box) running Pi-hole with custom blocklists, configure DNS-level filtering with time-based access rules, or implement iptables/nftables rules on your router to enforce schedules. You can use hostapd with separate SSIDs for children with different firewall rules, set up a transparent proxy with squid + SquidGuard for content filtering and time restrictions, or configure your router's DHCP to assign specific DNS servers per MAC address with dnsmasq managing time windows. If you want more granular control, there's pfSense or OPNsense with packages like pfBlockerNG-devel for domain blocking and traffic shaping, or you could write a simple cron job that modifies your firewall rules based on time of day. These are all straightforward solutions that don't require government-mandated age verification systems with their inevitable privacy nightmares and implementation overreach.
The technical capability exists; the question is whether parents are willing to invest a few hours to implement it rather than demanding legislation to do their job for them.