This is a useful search string to get a list of the UN publications relating to COVID19: https://tinyurl.com/ybyko5tm or this. Mostly they are short papers, and the list includes:
Digital Connectivity during COVID-19 : Access to Vital Information for Every Child (June 2020) by Daniel Kardefelt-Winther, Rogers Twesigye, Rostislav Zlámal, Marium Saeed, David Smahel, Mariya Stoilova and Sonia Livingstone. There are also papers relating to various protected or vulnerable populations (e.g. older people, women and girls, people on the move, indigenous peoples) and the relationship with Sustainable Development Goals.