It would be nice to see the function, to see the quests not started on the map, otherwise they are not visible and it is not clear where to look
There are addons on PC for this, sorry if you are not on PC.
I am categorically against mods, but I decided to try, and I was right,it doesn't work correctly, somewhere there is an icon with a quest in map,and there is no in-game, but somewhere on the contrary
have to make sure the addon is kept up to date, if its out of date and zos moves a quest giver, then the pin wont be in the right location since those are basically manually programmed into the addon
theres also several addons for finding quests, i know i used to use one, helped me find a few really out of the way quests
a non-addon way to telling if you are missing a quest is if you explore a POI and the icon is black, that means you have not done the associated quest/quest chain in the area
i have my main house (grand topal hideaway) listed in the housing tours, it has multiple target dummies, scribing altar, and grandmaster stations (in progress being filled out), as well as almost every antiquity furnishing on display to preview them