I've been living on Koh Phangan since March. AMA
They did switch to day time party from 11 am - 2 am-ish, as night time party is (was) not allowed
Ps: 7 years and counting Koh Phangan resident here.
Like the rest of us. From march to June the whole island just stayed at home in volunteer self-quarantine. Because of that Corona never arrived here and life is sort of returned to normal. Of course, no new people arrives, because the borders to Thailand are still closed, so it starts to be pretty empty with people on this island and most people are struggling.
For many months all beaches was closed so they have not been able to get into the water.