Update 6/25/20: According to TPG this has been extended. I no longer see any end date listed?
Original post 5/26/20: American Airlines is now allowing loyalty members to cancel award flights online and get the miles redeposited within 48 hours of cancelling online (previously you could cancel online but you wouldn’t get any sort of refund). This is valid on tickets purchased by May 31st, 2020 for travel through September 30th, 2020 (free cancellation period). Unfortunately for this to be possible the reservation must be for a single passenger (and this traveler must be the same as the AA member who booked the flights) for flights on American Airlines and the ticket must have been booked directly with American Airlines.
Hat tip to OMaaT