Europe was going to be nuked in a USA-USSR war, that's for sure. Every country except maybe Swizerland and Sweden were going to be nuked atleast 4 times.
Hmmm, but in the Fallout Universe, NATO was never mentioned. So there is no indicator that Sweden would be neutral to anyone.
I doubt that NATO existed there at all or at least anymore in 2077 as there is not even the slightest indicator for its existence in the Fallout lore.
Instead the European Commonwealth existed of which's setup we know only very little. Its role in the nuclear exchange is also unknown.
We know that they when the buttons were pushed in the USA and China, fired all their nukes aswell but it was never mentioned on who and who might have fired back at them.
The middle east ? The soviet union ? China aswell ? So far we dont know.
I agree that they must have recieved their share of nukes aswell, so much is sure as simply nobody in the Fallout world seems to have ever heard anything from them.
It is said that Alistair Tenpenny came from Europe to the USA. We dont know when, we dont know how (a ship perhaps ? ) and we dont know why.
He surely had no reason to relocate to the Capital Wasteland if Europe would be a better place.
Even if there are lots of places who were not involved in the war they all must have been more or less affected by it.
In a global nuclear war nobody is far enough away or independent enough for not recieving his rightful bite from the (insert s word here) sandwich.