Is pork belly pre-cooked in Canada?

My family belives that all pork in Canada is pre-cooked. Are they right? I bought five slices. Would like to know how to cook it. I am thinking of using the electric frying pan at 350 0Celsius for until it looks good to eat. I have an electric battery powered meat thermometer that I just found and don’t know how to use buried in somewhere that I don’t want to use.