Is RFC8781/PREF64 support planned to be implemented into OPNsense any time soon? I've been trying to get an IPv6-MOSTLY network going, and this is really the last thing I'm waiting on before I can really experiment with one.
I guess that's a no, then? :-\
If you want to reach the developers, I suggest to create an issue (feature request) on github, not a post on the community forum.