Is it true that in Zimbabwe and Botswana there was no such apartheid against blacks by whites?
I can’t say I know enough to answer that truthfully.
I do believe that the blacks in Rhodesia had some issues, but I don’t remember the details.
So, I would rather not post something inaccurate.
I don’t think they had the same rigid system SA did, but the country was ruled by whites with most land owned by whites, so blacks lived as serfs from what I understand. One difference was probably that Rhodesians were British-descended, while many of the whites in SA were Dutch-descended. After winning the Boer War, Britain made sure not to alienate the losers; they needed them to keep the grip on the country.