Agree, I also increased overall activity by working from home - I have simply more time.
I am not a regular 9am-5pm worker. Sometimes I need to be up early and work with Saudi or India. Sometimes we have those annoying evening calls with the US. There are also days when I skip from work early. Overall, ~20k steps daily average is not too bad for an home office worker, is it? True, my Saturday hikes typically contribute 25% of the weekly total.