There have been a couple other developments from the Central Bank of Nigeria (CBN):

Nigeria to redesign N200, N500 & N1,000 notes and demonitize old notes Jan 2023 #85810 https://twitter.com/briticoyemo/status/1585265472869629953 [Nitter]

and

The CBN wants to create ATM cards, could compete with Mastercard, Visa, and Verve https://techpoint.africa/2022/10/26/cbn-domestic-card-scheme