Here are some sources specifically for Long Covid
Australia
Living Evidence - post acute sequelae of COVID-19 (long COVID)
AIHW Report - Long Covid - a review of the literature, December 2022
United Kingdom
COVID-19 rapid guideline: managing the long-term effects of COVID-19
United States
RECOVER: Researching COVID to Enhance Recovery:
The National Institutes of Health (NIH) created the RECOVER Initiative to learn about the long-term effects of COVID.
AHRQ Effective Health Care Program
Some recent articles from Pubmed on Post-Acute COVID-19 Syndrome. You may need to be onsite to view these articles.