As to your second point, it’s a matter of doctrine and perception by the PLA. Doctrine as in the PLA still seems to be trying to figure out what it wants to do with the new helicopters. Perception as until very recently body armor was less a big deal. As were things like armored support vehicles (MRAPsBody armour remains uncommon until recently despite China being a significant exporter of body armour
Just a quick correction: according to thisAfrica, the Middle East, Some of Asia and Latin America. Very rarely Europe.
Africa like the Middle East tends to buy from everyone, though a few license. Asia is a back and forth depending on if the Nation in question views the PRC as a Threat or partner.
Remember China has what 40 territory disputes right now? I doubt the PRC would sell arms to a nation if they felt those might be used against them.