Thank you for your response!
In this case both parents have being residents in Canada for 2 years and have equal custody of the child... and they are all living in Canada at the moment with Work Permits that expire in March 2021. The husband wants to return to their home country and the wife wants a divorce and wants to stay in Canada, so the mother wants to extend the child's permit or even apply for permanent residence to keep the child in Canada. In this case the father has been the primary caregiver of the child for the past 7 years.
Thank you for your response in advance!