I've biked to work every day for more than a decade. When I started WFH, I read a comment online about doing a "fake commute." So, I put myself on a schedule for I go for a long brisk walk every morning before my regular work day.
This is a good way to think about it. I should start doing this. I keep meaning to go on morning walks and making excuses on how I can't do it today, but maybe if I think of it as a commute, it'll work.