The weapon in question is a Danish copy of the Suomi Kp31, it is essentially an identical to the Finish version of the smg, the only differences are the sights, stock and that it used a 20 round stick magazine made by the Madsen company in Denmark between 1941-1943 for the Danish Royal army which was allowed to exist under German occupation, about 1400 were made.
Covering the historical aspect, there isn’t a known record to me whether the Germans used those after disarming the Danes in 1943, as they were in 9mm and interchangable with the magazines of other Suomis the Germans also had in small numbers in their arsenal, I don’t see why the Germans should not have used them considering that by the end of the war they also equipped Volkssturm units with Danish gear.
The reason why it should be a gold order/premium and not an event weapon: Germany already has the Mp41r using a 32 round magazine, the Danish Suomi would pretty much be the same.
It would make more sense to have it as a gold order or premium squad weapon, replacing the Cönders in case it gets removed, as a new smg with a high rof, less recoil and more accuracy than the MP41r but a smaller magazine capacity.