Unable to get IP6 over PPPOE

How do I set up WAN port to get a ip6 connection over PPPOE.

I get IP6 when I use the ISP modem when the Modem is in Bridged mode my turris does not get a IP6 address only a IP4 address.

What Can i try to resolve this issue

Please post the output of:
cat /etc/config/network

(make sure to obfuscate any user credentials like pppoe user name and pppoe password).

Which ISP are you having this problem with?