My point was simply that the UN does not have air accident investigators, nor any legal duty to provide them so how can they be expected to produce any reports on these crashes?
If they are allowing dangerous cowboys to fly them around because they bid low then that is a problem for the UN's charter operation and they should change it to make sure they hire professional operators. And certainly there should be an "international AAIB" so that crashes get properly investigated wherever they occur, and not just those in the jurisdiction of countries that have the resources to fund proper enquiries.
Those are different issues, though, and the UN can't be expected to do public reports on crashes where they have no expertise or jurisdiction.