As of mod 23, there are now 3 unobtainable trophies/achievements on both PS4 and Xbox:
1.) Master of Demogorgon
2.) Tamer of Demogorgon
These are both for completing the Demogorgon encounter and have been unobtainable since the encounter was updated. I completed the encounter when it was playable in the trial queue and private queue and the trophy did not unlock. Both of these trophies/achievements will need to be specifically fixed for the drop of the new updated encounter.
3.) Four Dead Dragons!
Since the update of the dragonflight encounter, this is no longer achievable. I killed all 4 dragons with alliance-mates multiple times since the update and it did not unlock.
I would really appreciate your attention on these trophy/achievement issues. I know that the team has successfully fixed other trophy/achievements after content was removed or altered and am hopefully that trend continues. Thank you for your time and attention!