Identifying influencers rank position from Twitter data. The paper Measuring User Influence in Twitter: The Million Follower Fallacy gives a good understanding of identifying/segmenting influencers on twitter data.
Scrapping https://africafreak.com/100-most-influential-twitter-users-in-africa to grab the list of the Top 100 Twitter Influencers in africa and also https://www.atlanticcouncil.org/blogs/africasource/african-leaders-respond-to-coronavirus-on-twitter/#east-africa to grab the Top African Government twitter handles of different African countries.