In Nigeria I don't think the government has turned her eyes to gambling yet. I think there is just regulation by some body or individual body though recognised in the country but I don't know yet if government has made public statement about gambling like it has made with twitter or cryptocurrency. The gambling outfit in Nigeria is soccer with series of companies running on it like bet9ja, betking , etc. As to legalizing for now I don't know how that has gone, there are warning for under 18 years not to indulge in gambling however.
The controlling bodies for the gambling outfits in Nigeria also remit money to the federal government of Nigeria. The government knows about those gambling sites and can not say it does not. There is regulation for them. Any company that is controlled by a body is regulated. Early this year or so there was a repeated radio broadcast addressing gambling organisations in the country and it was signed by someone in government. So we can see that gambling is legalized and regulated in Nigeria.