I see a few with here[1] with OpenWRT using ipv6 with Community Fibre (UK), however I'm struggling to get my wan6 interface to come up. Technical support won't seem to help troubleshooting a third party router but a test with the supplied Linksys (which I have otherwise never used) did manage to get an ipv6 address ok, so I suspect the issue is with my OpenWRT config.
Would anyone be able to provide their working settings?