It certainly seems like the committee is open to examining the GRE requirement. This is an excerpt from the HKS admission blog dated July 7, 2020.
"We are aware that testing agencies have changed the delivery of exams in response to COVID-19, but even so, some applicants face barriers that did not exist in the past. Rest assured that as soon as the Committees set policy for the coming year, the details will be shared on this blog and on the application requirements portion of our website. "