Map completion
You probably simply overlooked some portions of maps. Press M, and zoom out. Then hover your cursor over every map name; doing so will show you if you have 100% done in that zone. Lastly, go to the Chantry of Secrets to make sure you have that POI.
if you find a map that isnt at 100%, you can hover over the icon legend on the side of the map screen and the missing types will highlight on the map for you.
you can also turn on that content option in the options menu that “leads you” to the next nearest point you haven’t found.
visit the chantry of secrets, its the only poi that’s required that is never pointed out, and unless you choose and play through the order of whispers story you are never led to it naturally.
pay attention to maps that have had things added since you may have explored them before. Divinity’s Reach, Kessex Hills, Lions Arch, Brisban Wildlands, and so on.
I have looked at every map, it says 100% of all of them, including Chantry of secrets.
You wouldn’t be able to see the Chantry of Secrets on the map unless you’re inside of it.
Hm. Could you share a screenshot of your world map or anything?
Ahh stupid me I forgot the grove!
Ahhh, ok. Glad you got it sorted out.