You can hire a lawyer and apply for judicial review. Or do JR yourself. Assume you know how JR works. If you "win" your case it goes to another officer to review. Can be still be refused. If you think her case is strong with her past application with funds, ties to return and showing a reason to leave then go ahead.So that means I should not apply for judicial review.
A relative fully supporting a visit and niece and parents showing no funds to support visit is usually a refusal and red flag. Parents don't have the money and if something happened while she was in Canada with you then she has no money to return home.
