Op as a Nigerian you supposed know weti dey happen in di country why people dey leave those exchanges, people no dey keep coins there again because of the drift between Nigeria government and them . As the previous commenter said there many factors. People are not using it like before again and also people withdraw their services from there. The attacks from government also make it to decline.
When Binance P2P closed, my friends and I sought alternatives on Bitget, and we've been comfortable there ever since, due to the quality of their service. However, I must say that since they're among the CEXs with positive growth increase, they deserve commendation for really stepping up. Another factor I think is responsible is the market uncertainty we've been having, as there hasn't been any major market movement yet, in my opinion.