The question has already been answered.
The most viewed NHL game of all-time is Game 7 of the Boston-Vancouver SCF in 2011. 9,690,000 viewers tuned in to the game. The second most watched NHL game ever recorded was in 2021, with Game 7 of the Toronto-Montreal playoff series pulling in 7,400,000 viewers.
The Game 5 Calgary vs Edmonton game in 2022 probably does not even finish in the top 100 most watched NHL games. In fact, all 7 games of the Toronto-Montreal series outdrew game 5 of the battle of Alberta.
There are only 4.8 million Albertans. On top of Ontario-Quebec having over 25 million people, most of the Maritimes and a vocal minority of fans in other markets still cheer for the Habs and Leafs, as they were 2 of the original six.
source:
List of most watched television broadcasts in Canada - Wikipedia