How to access pve webpage from ipv6 address?

[saberlion]

Here is my network topology.
All the machine is bridged including two pve hosts. The dhcpv6 is only enabled from router VM.
My home network has both ipv4 and ipv6. But only ipv6 is public net.
The router vm can get [ipv6 address + ipv6 prefix + fe80 gateway] using DHCPv6 client mode for wan port.
for example:
wan:
ipv6 address: xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/128
ipv6 prefix: xxxx:xxxx:xxxx:xxxx::/60

Then lan1:
ipv6 address: xxxx:xxxx:xxxx:xxxY::1001/64
dhcpv6 enabled

I tested with domain, here is the result:
All the VMs can get ipv6 address and using ddns, all the website in the VMs can access from other ipv6 network.
All the website(port 8006) from pve hosts can't get ipv6 address by default.
If I set:
ipv6 address: xxxx:xxxx:xxxx:xxxY::1002/64
gateway: xxxx:xxxx:xxxx:xxxY::

after: `ifreload -a`

Ping ipv6 address is ok: ping6 ipv6-test.com
I can access the webpage from the local network: https://[xxxx:xxxx:xxxx:xxxY::1002]:8006
But the link couldn't be accessed by other ipv6 network. If I use domain, the domain is still unaccessable.

Any idea to fix this problem would be appreciate! Thanks!