I'm not sure if its just a "point-in-time" thing or not, but the examples that are shipped with the latest draft of the CARIN BB IG have numerous coding issues which make them invalid per the specification.

For Connectathon 25, I enumerated all of the issues and documented what it takes to make these valid in the following zulip channel:
https://chat.fhir.org/#narrow/stream/204607-CARIN-IG.20for.20Blue.20Button.C2.AE/topic/Examples.20from.20Connectathon/near/209690418

I will not repeat the issues here, but please let me know if you need me to expand on any of the issues identified on that post.