Not sure on a Canadian French keyboard, but on International English it's Alt ⌥ N then another letter, e.g. N to get ñ
Similar for acute, Alt ⌥ E then E gives é.
System Prefs - Keyboard - "Show Keyboard, Emoji & Symbol Viewers in menu bar"… then from the top menu, open 'Show Keyboard Viewer' & then when you hold the alt key you'll see the 'dead' keys highlighted in orange.