Thank you for your email.
NSBEP has general ethics and standards in place to guide psychologists. Though not an exhaustive list, below are some publications from NSBEP that you may find helpful to review; these integrate relevant standards and principles.
Working with Children and Adolescents
https://www.ns-rp.ca/downloads/Working_with_Children_and_Adolescents.pdf nCustody & Access Guidelines
https://www.ns-rp.ca/downloads/NSBEPCustodyandAccessGuidelines.pdf nThese documents are not restricted to the issues you raise, but, for example. some of the principles shared in these publications may illustrate the approach taken by psychologists when providing service to children and parents.
If you are considering approaching a psychologist you may wish to contact their office and outline the concerns you have in advance.