The RA is not working, the dhcp pd server is not broadcasting ipv6 for lan devices. This has been the issue from day 1, reported, described in detail, screenshots and logs. There are some ways to get ipv6 in lan, that trick with ULA (but after a router restart has to be done again). The only way to get a proper setup is to configure manually all lan devices, eliminating the need for dhcp pd server. But that is not an option for the masses, it requires some knowledge and time.