The USA is a current imperial power and built atop of a genocide against its native population. The US as an entity has no history that would be relevant to a historical plunder carried out by the British.

Russia is currently in direct conflict with the UK (specifically financial and indirect military support to Ukraine, obviously not with regards to a hot war). Whereas that is not the case with any African nations I am aware of, yet many of those nations face significant travel restrictions not faced by a pre Ukraine invasion Russian population.