The government isn't really in a good place to capitalise on this, they recently signed a deal with DP World to operate part of the Dar es Salaam port. Sentiment on the deal has been pretty negative (massive understatement of the year, no official polls but anecdotally, everyone was pretty pissed with it). https://www.ft.com/content/f5776df5-9375-438f-bbeb-bc7e8c296...
Considering this existing agreement, the murky dealings surrounding it, the circumstances we found out about it (it was leaked). I don't see them seeking anyone's attention, or even making a show of the increased burden to show that DP World or other "investors" are needed.
> Maersk said vessels routed around the Cape will as far as possible try to fuel at origin or destination.
> “In case there is a need for bunkering en route, it would be decided on a case by case basis with Walvis Bay (Namibia) or Port Louis (Mauritius) being the top options,” a spokesperson said.
I grew up in Walvis Bay and back then I could cycle from one end to the other in well under 30min. Last census says 62k pop.