I don't know when did this new updates took place because the last time I checked, banks were warning customers not to use accounts for anything crypto related to avoid freeze of account. Maybe, these banks just wrote it and haven't started operating on cryptocurrency. I will advise you not to use your bank account to buy crypto directly but use p2p trade to avoid trouble.
I wonder too because no Nigeria Bank is crypto friendly, don't allow any blog or publication to deceive you. Any Nigeria bank that's being used for crypto related transactions will be blocked and you might get investigated for money laundering. What I'll consider banks that are crypto friendly are those with swift transactions because you'll need that to confirm your trades when you buy or sell crypto through P2P and not banks that'll debate you but won't process your transaction until hours later.
Many Nigeria banks are known for that and they blame this on the network meanwhile they allocate billions frequently for maintenance but still they don't have good services. For now only the opay and his brothers are doing well for fast transaction but still don't indicate that you're carrying out a crypto transaction when you make use of this banks.