I recently came across a medium clue with coordinates not on the coordinate list.
The coordinates are as followed: 02.50 North / 21.46 East
Here is the exact location for it as well.

Thank you for the submission!  Someone should be on that shortly.  In the future, please use the Treasure Trails forum in the Website Corrections and Updates forums to ensure that the right people see it :).

Isn't this a relocated spot for the 02.48 North 22.30 East one?

Just west of the H.A.M. Headquarters entrance, which you can find in the abandoned house with all the tiny spiders, near the dungeon mark on your minimap.

I doubt this one still exists as the H.A.M. hut is long gone buried under the crater.

Hey @Chloe Skills thanks for submitting this, it does appear that Kaur is correct and this is a replacement for the HAM hideout coordinate now the hideout has been moved. I've replaced it with this one and credit you both!