I know it’s not the best source from what I read on the Wikipedia article Greenland being a Autonomous territory of Denmark is apart of Denmark and therefore a NATO member
On 20 March 2023 Greenland send their own diplomat within Denmark’s group. So not only are they a Denmark Autonomous territory but they also have their own diplomat in NATO.
I know it’s not the best source from what I read on the Wikipedia article Greenland being a Autonomous territory of Denmark is apart of Denmark and therefore a NATO member
Also found this article
On 20 March 2023 Greenland send their own diplomat within Denmark’s group. So not only are they a Denmark Autonomous territory but they also have their own diplomat in NATO.