I think countries beyond the US have a much better prospect of doing this.
The most efficient way to incorporate exercise into your day is to make it part of your commute. Walking, biking, taking the train etc. - different modes are viable for different locations.
If you choose a job where this is not possible, you're just going to have to make it up some other way - two hours per week in a gym goes farther than most people think if you spend that time well.
In many cases at least one of these options is available to people but instead of taking it they whine that the job itself is too sedentary. I don't have a lot of sympathy, there are far worse jobs for the body than sitting in a chair (or standing stationary, your choice!) all day.
If truly none of these options are available to you in your current job - find a new one if you value your health. So many people have chosen a job for the money or prestige and just ignored this element completely. Those are unhappy people on account of their own choice.
When folks are working a production line the bosses have to coordinate it - but in an office there's more flexibility. And if someone in an office wants to skip their breaks to leave early, or have a larger number of shorter breaks, they generally have that freedom.
Is this not the case everywhere?
Most people can't change their commute. Pedestrian infrastructure is simply not there. Public transit doesn't exist in most places. Your option is to drive or drive or drive.
Get a new job that will require you to be in your chair in an office just like the last one.
In many cases... Nope. Get out of your bubble.