I am not surprise about the findings that people are sleeping later and longer. The lack of stimuli from going to work, engaging face to face with colleagues, and coming home feels a like remote working induced fog.
This feeling reminds me of the Mars500 study where astronauts simulates the trip to Mars and stays in a capsule for 520 days. The study finds that as repetitive routine sets in, the crew's mood worsened, as a result, the crew slept later and longer.