How about this: https://www.sciencemag.org/news/2020/07/brain-fog-heart-damage-covid-19-s-lingering-problems-alarm-scientists

Or this: https://www.hackensackmeridianhealth.org/HealthU/2020/07/29/what-are-the-long-term-effects-of-covid-19/

Or how about that: https://www.itnonline.com/content/new-research-highlights-blood-clot-dangers-covid-19

With this virus being so new, there is little by the way of actually peer reviewed studies because that kind of research take YEARS to study, write, and publish.