RE:rumors... Where did you come across this "rumor"?
I don't doubt that there will be a buyout by a major sooner than later. A billion or two is pennies to them and they routinely write off billion dollar dusters.
But I would think it would be the French (TotalEnergies) with their partners the Chinese since they are already in the area. Plus the Chinese have been pouring a fortune in Namibia having built up the main port, built oil storage facilities, funded the new officers college, trained security personnel, etc. and there are already a lot of them in Namibia.