I would like to share a comment I have received on this topic from a CBPR researcher:-
I think part of the problem is that ethics committees are generally not very well equiped with dealing with these kinds of projects when they review them and try to review them within their normal framework (which traditionally has its roots in the biomedical/clinical), which is less than ideal. Work needs to be done to agree what might be an ethical framework for this and other kinds of “engaged” research and then this needs to be transmitted to ethics committees. This kind of work is iterative and the ethical approval process needs to be responsive to that.
Would you agree? Was the ethical review of your CBPR research satisfactory?