Further adding to what MistakeNot mentioned, click on your Journal and instead of checking under 'Seventh Umbral Era main scenario quests', click the button and select 'Seventh Astral Era main scenario quests', as that it where the 2.1-2.55 main story quests are listed.

Chances are you have already started the patch storylines that actually move the Scions to a different location (Revenant's Toll in Mor Dhona to be precise), so it's likely you're already onto 2.1's story or beyond. either way, check the Journal under 'Seventh Astral Era main scenario quests'.