I recently decided to give Altibox and their 6rd implementation another go — searching the interwebs I stumbled upon a Norwegian forum post that read (translation by me):
Altibox offers native dual-stack IPv6 if your home central is in bridge mode. You get a /56 prefix though DHCPv6-PD (prefix delegation) and can split it into multiple /64 networks. (…) — sveinse
WHAT!? Really? They offer native dual-stack IPv6 with DHCPv6-PD? Let’s test it! 🥳