[2020] Easy way to find undiscovered POI's?

So I'm going for map completion and right now I've almost completed Brisban Wildlands, the only thing left is 1 more POI.

Apparently I missed 1 POI and I can't really find it on the map anywhere. The game tips are leading me to undiscovered area's or nearby events.

Any easy way to figure this out?

EDIT: I found the missing POI, reason I couldn't find it was because the map was indeed still black out. Thanks for the help!