In Norway and it's definitely becoming more of a thing. Growing up I never did it, but now I run out of lollies because there's so many kids out and about.
On the flip side, Norway does have their own Halloween style celebration where you go around dressed up and demand lollies from people door to door (julebukk - I'm not sure what the exact date for it is, and I think it varies depending on where you are, but it takes place between boxing day and up to and on new year's Eve) which I've definitely noticed has been declining the last few years. Maybe kids want to celebrate Halloween more than julebukk? Probably because on Halloween you can just, show up and demand shit while on julebukk you actually have to prepare a little song and whatnot.
Shame because like, julebukk is a) actually traditional and b) has some weird ass lore behind it. Like it's something about appeasing the Christmas goat (who may or may not be a demon saint Nicholas personally went down to hell to beat the shit out of until he agreed to help him)