I think part of the issue here is culture difference. I get the feeling that the expectation afforded to managers in the UK is that they are reasonable. That is not the expectation afforded managers here.
I wonder if that is a difference in professions? People at work have my home number, but the only time it is called is when my boss is checking up on me (making sure I'm not dying) after being sick or when I'm supporting an international trip, and I don't think it has ever been called outside of those two reasons. The expectation here is that you do your work while at work or on the clock at home if you are going virtual that day.