Great. IPv6 in mode Access Point is quite complicated in OpenWrt because I am not aware of anyone having done that before. Even CZ.NIC’s Turris OS failed so far. It is not only SLAAC but also DHCPv6, depending on the M/O/A bits in the IPv6 Router Advertisements. And then extracting the DNS servers (from DHCPv4, IPv6 Router Advertisement, and/or DHCPv6). Looking forward to see your approach then.