@johnpoz
Config is done and working as expected.
Got a /48 from HE and /50 subnets to LAN.
9fc6b336-5d05-4538-b512-87464720b176-image.png
DHCPv6 Server & RA (/56 to downstream CPEs)
8466e9df-c67d-489c-a7cf-09743b7f7b14-image.png
RA
3bffbe77-935e-49ce-b134-6c532079aa6b-image.png
Tested with Android 8/9, Android TV 7.1.2, iOS 9.3.6, Windows 10, Arch Linux, OpenWRT, and some others Home Gateways.