The main reason one does not see the .30/30 in Africa is probably because safaris are so expensive, why would one take such a less than ideal choice of firearm, unless one is wealthy and has a dozen safaris already under one's belt ...

A .308 Winchester or .30-06 will do everything better than a .30/30.

Having said that, some clients, who have had the experience of many safaris do sometimes take "niche" choices such as Marlin .45/70's etc etc.

Lever actions were seen in Africa, in the hands of Roosevelt, the Johnson's and probably other Americans. Mentioned in the fictional book(s) "King Solomon's Mines". Probably a good fast shooting, "large" capacity magazine choice for short range shooting when unruly savages and cannibals were a proble ... the assault rifle of the day!