Hyatt has extended their coronavirus travel waivers so that prepaid bookings remain refundable through June 30. This matches a move already made by Hilton and Marriott.
There are, however, no new World Of Hyatt updates. So points are still set to expire again starting in June, elite status has only been extended for Asia Pacific members (who are not at this point in the epicenter of virus spread), and free night certificates have not been extended at all and continue to expire (although you should be able to convert expired certificates into points).