If the Nigerian government launches a blockchain, rest assured it's not going to be a decentralized blockchain even if they claim it is, use this blockchain at your own peril.
I do not know what they even want to teach Nigerian about cryptocurrencies when and after they banned crypto multiple times and are yet to lift the ban.
Without them lifting the ban on cryptocurrencies, it is clear that they don’t have anything to do with the technology and are just after their own income, to fill their bags the more. I don’t know how a country that publicly open up that they don’t want anyone to transact any cryptocurrency or take part in any of them would want to create a system that allows such transactions to be processed on them. You can’t be two sided, if you’re with the people, say you’re with them and if you’re not, make it clear to them. I also don’t see any positive thing coming out from this until they change their stance about cryptocurrencies and make us see it as a more viable option to transact with even after regulating them.