1. Complete Alam's flow either way
2. Complete Domia's warrior flow
3. Don't reveal your true identity to Fahda but agree not to take 90 gold when talking to Domia in the vault.
Did you click the door on the right?
Yes. It's probably a bug from version change. I replayed the infiltration event and now both are in the palace. But in the cave all images were missing. Other than that, no problems.
The only issue I found was that after getting both fiefdoms I am unable to get the morale high enough to withdraw troops to attack the 3rd unruled fiefdom. They immediately start burning buildings and rebel 🤣🔥