I have leveled this Nightborne from 10 to noq 56 and the quest to unlock heritage armor STILL has not activated. Aren’t I supposed to get it at 50???
You should have gotten it at level 50, yes.
Maybe put in a ticket, if you don’t see any hidden quests, go look around at Nighthold maybe or Thalyssra, I forgot how I got it. You might have talked to them, and not picked up the quest.
Did you use the gear update feature added in the last patch? That seems to be counting as a “character boost” on the backend and makes you lose heritage armor qualifications.