I have consulted on your enquiry. The additional circumstances you have outlined would not be problematic, given the work would be done under the supervision of a psychologist and clients are informed of the arrangements (of course the individual would be careful not to identify as a psychologist until they are registered with NSRP). The arrangement you outlined would be in keeping with professional standards and not raise concerns under the Regulated Health Professions Act and the Psychology Regulations. The NSRP does not differentiate the activities that can be done utilizing such an arrangement.
As a point of information, I would take this opportunity to draw your attention to the section “Work Prior to Registration” in the Information for Employers document, as you or your employer may find this information helpful in the future as well. You can obtain that document from the following URL:
https://www.ns-rp.ca/applicants/information-for-employers/