I feel like Canada is of two minds, awkwardly and indecisively straddling North American English and British English. It wasn’t until I worked overseas that I realized North America has a very distinctive English that imprints on people, even if they lived there a few years. As in Londoners who spent a few years in North America as toddlers have obvious North American tonality, which is baffling to me.
I have native relatives in Canada and the UK and I find the language dynamics across the anglosphere fascinating.
Does Canadian English still use "gotten"? IIRC, that's a vestige of British English that's been lost in Britain.
Edit: It appears my conjecture was correct: https://www.sarahwoodbury.com/on-the-use-of-the-word-gotten/
I see it from time to time online, and immediately assume they're a non-native speaker who doesn't understand the nonsensical nuances of the language.
Eg people will say something like "I've 3 apples", which is just "I have 3 apples", which is perfectly gramattical. But, for some reason, we use "I've got 3 apples". But I think we'd also say "I have 3 apples" and not "I have got 3 apples".
Language is weird.
or it's got it's own dialect, which has inherited features from both british and american english but is now evolving on its own.