I believe the poster indicated that the child is NOT accompanying. If unaccompanying, none of these aspects are relevant. If the child does not get PR status (indeed is not even applying for it now), there are no trafficking/custody related concerns as part of this app.
- If she consent, there'll be high level scrutiny on child sponsorship. Since your husband has been away, assuming his ex wife assumed full custody of a child. Expect there'll be back and forth with Ottawa, they'll want to make sure minor is not removed from her biological mother or trafficked. Just a heads up on what to expect.
The more serious concern/scrutiny will be if the father declares his child but cannot get the child examined.