No, I've actually driven from Vancouver to Alberta quite a few times, a couple to Saskatchewan, and once to Manitoba.

Outside of very specific government buildings, I barely see them*. It's so rare that, like I said, I very much noticed when one was suddenly in walking distance of my house. I've seen them super faded in windows of old buildings at times, but not a flag standing outside.

(*If I go to the extremely rural areas of BC or Alberta, I will see more in a single 'town', and I mean like ~100 people, than I will in Vancouver, say. But those in small areas stand out and are, frankly, not usually a great sign? One house that has it also has a confederate flag up, as well as a replica General Lee car from Dukes of Hazzard)