Talk to Grace, the nun.
Talk to her to begin the Mondstadt and its Archon quest.
Level 8 rewards players with instructions on how to craft an Electroculus Resonance Stone, a consumable that indicates the location of an uncollected Electroculus.
An important time-saving aspect of this is that you can use a piece of Condensed Resin in place of Original Resin to get double the rewards from 20 Resin Ley Line Blossoms and Petrified Trees.
This quest seems to be available only after a certain Adventure Rank.
I've already noticed they've stepped up their game when it came to the cutscenes in the Inazuma arc.