Digging further into the FRR OSPF IPV6 GUI functions i see more problems within the GUI and function of the FRR package:
OSPF IPv6 doesn´t work with OPENVPN IPv6 P2P tunnels. Changing the OPSFv6 Interface to use the WAN Interface works perfectly. The IPv6 tunnel is working perfectly, FW Rules are set to "pass ipv4+6 * any any" but there is no OSPF "Hello" activity on the IPv6 tunnel, when OSPF6 ist set to use this tunnel as IPv6 activated interface with another FRR Pfsense on the other site. Usually OSPF IPv6 routes are based on the Link Local IP address of the interface, maybe this is a problem here, just guessing.
OSPF IPv6 current version cannot use areas (not implemented yet) - so the OPSFv6 GUI is really misleading, we can change the area to some other, but there is no warning that there is no function behind that. There maybe a future version, where areas are supported in OPSF IPV6.
OSPF Global Settings: The subnet field ist too short for a full IPv6 address, so a long IPv6 address is only partially displayed.
OSPF6 Settings : the last part is really a problem, we can suppose, that there should be "Distribute Networks" and "Disable Redistribution" but non is there - only a subnet/area id field. There are some parts missing and it doesn´t work … even in OSPF v4 it doesn´t work.
We really need an updated version of the FRR routing package, the current version is 5.x, where in Pfsense we are at 3.x.
I really like that FRR package, but it is in a "BETA" State and with all this GUI problems not easy to implement.