I have mileage tickets BKK-SIN return and BKK-ICN return on ‘ice’ but expiring by Dec. I have my long haul Q->J flights successfully reactivated.

Unfortunately it seems that the days of a quick overnight or same day return (lounge hopping or whatever) are well in the past due to the testing requirements - at least for the immediate future. Things hopefully will have improved by Oct/Nov. Hate to throwaway these flights …. or try and get a miles/taxes refund.