Panda Paw Dragon Claw blog, which is run by a team "to tell a better story about China's involvement beyond its borders," ran a lengthy analysis on 17 July 2019 titled "Assessing China's Most Comprehensive Response to the 'Debt Trap': The Belt and Road 'Debt Trap Sustainability Framework'" by Xinyue Ma, project leader of the Global Development Policy Center at Boston University.
It provides links to many recent studies and reports that deal with China's debt issues globally. It looks at countries that have signed Belt and Road agreements with China (40 in Africa) and are debt distressed (6 in Africa) or at high risk of debt distress (11 in Africa).