It's nothing new and this is a fact but still, countries prefer to choose the technologygy behind it and according to Ugandan government
In his remarks, the governor clarified that the central bank does not have a comprehensive oversight of all financial services firms and institutions, and that its supervision typically spans commercial banks, credit institutions, foreign exchange bureaus and money remittance service providers.
with this remark, we can conclude that they do not want to add another currency because they do not have oversight on oversight of all financial services firms and they are at loss on how they can manage it if cryptocurrency is added.