When I started wfh, I started eating more snacks, smaller meals (or not finishing after I was full), walking a lot while listening to podcasts (I had given up driving for taking rides hares before that was suddenly a danger).
Today, I live in a place that doesn’t have a lot of natural beauty (downtown of my city) so walking sucks. I have a car again. And I work in the office 2-3 days per week. I have regained the weight.