How to configure IPv6 PD forwarding to LAN

My setup:

Fritz Box 7530 with OpenWrt 23.05.3 r23809-234f1a2efa / LuCI openwrt-23.05 branch git-24.086.45142-09d5a38

LAN 1 is the WAN connected to a 5G Outdoor Modem

IPv4 works, but I am not sure how to set up IPv6 PD (IPv6 works on the router itself)

A1 (Austria) Internet

I doubt that there is a place for PD in this setup.
I suppose you need to configure a relay.

What do you mean? I am getting IPv6-PD on the wan6 interface

IPv6-PD: 2001:...

I mean that you don't have any prefix delegated. In Luci you probably see the same subnet twice, in IPv6 and IPv6-PD lines.
Check with ifstatus wan6 instead.

Thank you very much. It seems to work in relay mode :grinning: