Just noticed that my upgrade certificates that were originally expiring in June have been extended for 9 months, to March 31, 2023. No changes to mileage expiration yet though. Also, I should have qualified for an 18-month extension since I had both a co-branded card (EVA Amex) and mileage activity (from an EVA Mileage Mall purchase), but I'll wait to see what happens with the miles first.