The only reason US needs to control Greenland instead of a NATO ally is to threaten Europe.

Greenland is far away from Russia. BS that Russia and China have a presence in Arctic is that they are cooperating on projects in Russian waters. Any use of Greenland waters for shipping will be to deliver to eastern North America from China, and so inherently welcome.

There will be zero resource development projects in Canada or Greenland by countries that have enemy status with NATO, because of extreme expense of shipping resources back to Russia, and extreme risk of sabotage of projects.