Why did the colonies that would become Canada not join the other British colonies to their south that would become the US when they rebelled against British authority? In the War of 1812 the US invaded Canada, was there sentiment in Canada for uniting with the US at the time that would cause the US to want to invade Canada? If so, when did the sentiment die out? Was any sentiment for joining the US go away as loyalists moved to Canada after the Revolutionary War? Also was Canada referred to as Canada at the time of the Revolution or did that come later when Canada gained independence? If it was called Canada, why was Canada given its own name that would distinguish from the 13 British Colonies to the South?
There's always more to be said, but in the meantime you may find some answers about the status of Britain's Canadian colonies during the American Revolution in this thread by u/enygma9753.
The region had been known colloquially/informally as "Canada" or "the Canadas" since the earliest French explorers, who had misinterpreted the native Iroquoian term "kanata" (or "village") to mean the entire territory. The term would be used to refer to the lands of New France north of the St. Lawrence River aka Quebec throughout the New France era. New France's Maritime territory was known as Acadia until the British captured it.