So, I found that a few other items from CEs were missing along with a couple of crown items from boxes issued as part of CE entitlements.

As I had to check each CE at the installation level anyway, I uninstalled all of them, cold booted my console and reinstalled them again... and they all came back, although you still can't see any chapters prior to Blackwood in the list.

So for now, my main issue is fixed however not being able to see previous chapters made the whole thing a real slog and added about an hour to my troubleshooting and fixes!