Correct. I myself am confused as to how she can live in Canada. You can get duel citizenship with Canada for most countries. But you still would need a legal reason as to why she’s would get citizenship in Canada. (Job, marrie style of things). But there’s is no way she can have canadian citizenship or residency unless she gets some kind of visa. As I understand, she still isn’t a British citizen so she wouldn’t have commonwealth with Canada. I realize Harry can reside in Canada as a commonwealth but she can’t. She is just American (only American) at this point so unless she was using her “power” Andrew somehow got bumped up the list of something, she would only legally be allowed to live in Canada for a day under six full months ahead on a travelers visa. She’s has no claim to residency or citizenship in Canada. She can get British bc she isn’t married but that doesn’t work that was in Canada. She is a visitor of Canada, as she is only American legally, so she’s may only be here on a visitors visa.
This isn’t why they probably wanted to split there time 50/50 as she couldn’t legally be in Canada over 6 months a year.