This has probably been done to death but at the peak of lockdown I wasn't working so wouldn't have read those threads.
I go through bursts of getting my head down and then find I start losing focus. Now, for instance, whilst I am on MN I am officially working.
I don't think I'm slacking off. I put the hours in. I get the work done. I suppose if I were in the office I would be having tea breaks and chatting at times.
But I feel so guilty for not working every minute of the day.