It's a mental separation kind of thing. When I've had jobs where I work at an office, I am able to mentally leave work at work. When I've worked from home, I struggle to do that and end up thinking about work when showering or doing dishes.
before covid, you had this 9 to 5 separation where people were required to come in so they basically did, and after they left they would just sometimes even leave the laptops at work
during covid you took afternoon naps. so then this liberty also traded for you to work other odd hours with a get-it-done-when-you-can mentality outside the 9 to 5
post covid now? the employers want to have their cake and eat it too; where they require you to come to the office, then go home and work on for some further hours. I even had a senior position where I had a 1 a.m. and a 2 a.m. call. suffice to say I left really soon after