I do not confirm or deny that I wore a face mask during my Canada Post visit. But Canada is supposedly a free country, and anyone is supposedly free to wear a mask or not wear a mask during their Canada Post visit. Heck, a year or two ago, everyone is REQUIRED to wear a mask if they wanted to enter the post office. So, yes, if you want perfect OpSec, a face mask and a cap are your best friends.
That said, I don’t think we have facial recognition cameras installed everywhere here in Canada yet. Our government is too inefficient and slow to adopt surveillance and crackdown tech. They would not have let this Bull Bitcoin non-KYC buying thing fly, let alone allow them to use federal government infrastructure to fly, if the Canadian government was in any way efficient / competent with surveillance and crackdown.