China mandates IPv6. So does the US, but the US drags their feet. Meanwhile in Europe it's near universal even though not mandated and no v4 shortage.
I wish, just 37.73% of IPv6-capable users in Europe according to APNIC despite much higher availability in transit AS. Highest subgroup is Western Europe at around 72.09%, which is still far from near universal. Similar per-country numbers from Cisco.
Unless I've missed something, the US only mandates it for government networks. I don't think there is any mandate for private entities to implement it.
>Meanwhile in Europe it's near universal
False: https://stats.labs.apnic.net/ipv6