It's a dangerous juncture. I remember vividly that when Russia invaded, last year in February, I thought, “Well, does this mean now that western companies doing business in Russia will be punished?” It didn't take long for Russia to seize all those aircraft that were western-owned but leased to Russia, aircraft that happened to be in Russia. You can do that if you're a country that doesn't respect international rules, conventions and etiquette.
Now, as you mentioned, Canada has seized a Russian aircraft as part of its sanctions and has a legal basis for doing so, but Canada is a country that follows rules and regulations and the letter of the law. It will seize one aircraft because it sees a legal basis for doing so, but Russia doesn't operate according to the same rules.
I think if I were a Canadian company, I would worry that I could now become the target of Russian anger and retaliation, just as China has responded to various western government actions by harming random western companies.