Epic Games’ help:
Apple will no longer allow users to sign into Epic Games accounts using “Sign In with Apple” as soon as September 11, 2020. If you have previously used “Sign In with Apple”, please update your Epic Games account email address and password immediately so that you can still login after September 11, 2020.
They say if someone misses the deadline, they can still contact Epic and update their account after identity verification. I’m curious how exactly that verification would work.