It is absolutely tragic that three experienced aviators have lost their lives in this awful accident. RIP Guys
I truly hope that they have not been let down by a lack of regulation which appears to allow airlines such as Avient to continue worldwide operations without any real safety oversight and effectively allows them to operate under a flag of convenience. The company aircraft rarely, if ever, operate to Zimbabwe, so there is little chance for the controlling authority to maintain an effective regime of oversight.
I would very much doubt that the authority in question have the necessary resources to effectively manage the safety of any airline operating outside of its boarders, let alone an airline which has its command and control based in the United Kingdom with an operational base in Liege, Belgium, even if it does have a pseusdo airline HQ in Harare.
It will be interesting to see what the FAA/NTSB/CAAC accident investigators conclude with regard to the introduction of a new aircraft type onto the Avient Air Operators Certificate and whether all the requisit elements for this operation were sufficiently in place to support its introduction to revenue service.