At least for me, commuting by bike is just routine. Now that my current gig is within walking distance, these about 5 hours of biking per week just disappeared. I think that's because I find biking, running, swimming, actually anything stressing endurance an utter chore after a few weeks. Whereas while commuting a can use the time to spin up my brain and preload the working context. And in the evening it's a nice way to cool down and put everything aside.
I'm trying to compensate by going for a longer walk after-office, but because it's not a necessity I'll drop that far more often than not. I'm a lazy bastard, after all ...
In a WFH situation, it's actually the lack of exercise or commute that I'm talking about.
Walking or biking to work and walking with co-workers to and from lunch several times a week is healthy.
One has to make up for these lost opportunities by exercising more simply for the sake of exercising.
The social element of work has a lot of advantages.
WFH took me from riding/walking 20 miles per week to near zero.
It's taken a lot of discipline and time to duplicate that.