I posted this in the re-opening thread below but figured it is probably worth it's own thread.
From the Yosemite Conservancy wilderness permits page:
Walk-up wilderness permits are not available in the park in 2020. Beginning June 11, 40% of permits that would normally be available first-come, first-served are instead available by lottery two weeks in advance. Beginning June 11, you can submit a request 15 days in advance of a hike, with the lottery running 14 days in advance. Unreserved permits remain available up to nine days in advance. It is not possible to obtain a wilderness permit reservation fewer than nine days in advance.
For hiking start dates from June 11 to June 25, any unreserved permits that are part of the 60% quota are available at https://yosemite.org/yosemite-wilderness-permit-request.../