I just realized looking at the sources that I should wait for independent confirmation. This looks like one of those stories planted by pro-kamwana groupies sending feelers out.
They want to gauge the reactions, if any, from these leaders before deciding whether it's worthwhile to officially communicate such a wish to them.
If an embassy official from the aforementioned countries denies it, they'll not bother calling that leader to join the circus. A request they recognize would be ridiculous, even to an African strongman.
For the moment I'll treat it as what kamwana would love to happen rather than something even being discussed in the opulent residences of the despots.