tried to get it working on my #OPNsense, but there's definitely a bunch of things missing:
- the option to set the PIO P flag for prefixes
- an actually working routing for delegated prefixes in this IA_PD-without-IA_NA scenario (https://github.com/opnsense/core/issues/8682#issuecomment-3300133623)
- a good way to handle delegated prefixes (or at least the general "super-prefix" where they are delegated from), e.g. with automatic aliases, in the firewall rules