Maskirovka. It is Russia, who needs the ceasefire. They are on backfoot, near collapse and wish to gather strength before attacking again.
The rest of what the Africans are saying is just domestically popular and meant to legitimize their service to Russia.
Wagner is mostly plundering Africas natural resources - gold.
In return, they give “protection” to the local dictators from being put down buy their local populations.
Or... they secretly help to foment coups against sitting African presidents the Kremlin do not like.