With regard to there being no relationship between AVZ and DRC, I think you're right.Given the latest announcement, I believe this is the current situation.
AVZ have exposed all the corrupt pigs running the DRC and they're just so offended by that they've refused to talk with AVZ.
By the excitement displayed by Kobald, it would appear that the DRC have told them they can have Manono south already.
But with it tied up in the courts by AVZ, there's no way they would or could take on that risk, as well as the reputational damage. They would be complicit in DRC corruption if they pulled a Zijin.
So they have to pay off AVZ.
It looks like there is no relationship or communication between AVZ and DRC.
I think AVZ could reasonably say "nup" untill at least all time high value is offered.
If I recall correctly, in the announcement from AVZ of the revised agreement with CATH there's wording that could be read the same way - i.e. that CATH would make representations to the DRC on AVZ's behalf.