In “Deadpool and Wolverine” (2024), The Desert Eagles taken from Nicepool appear to have a Canadian flag printed under the muzzle, a nod to Ryan Reynolds’ home country and that Canadians are nice.

He also tells a TVA agent to “keep his countries name out of his fuckin mouth” during the intro of the movie.

Wade Wilson(and Logan) are also Canadian

Deadpool is canonically Canadian in the comic books. I don’t think it’s ever said in the movies, but the city he lives in is obviously Vancouver from establishing shots.