I went fly fishing in Greenland this year with 66°north, an Icelandic outdoor clothes company. They were originally founded in 1926 and made clothes for sailors, but is now almost dressing the whole nation in all sorts of weathers. Here you can find their blog about fishing in Greenland with photos, videos and our story from the trip: https://www.66north.com/whats-on/fly-fishing-in-greenland/
Hope you enjoy it and please email for more information on Greenland.
all my best,