Yes , generally is the employers choice if they want to make a job for you or not...
I patrolled the parking lot for 2 months due to "No hand use" restriction.
but I still had to drive to work, open doors, make meals, eat, bath and go potty

fun times...had other modified jobs before this one , but this time was after HR had me sorting papers & putting in to over stuffed 4" 3 ring binders when my restriction was "no repetitive hand use".
My hands started cramping up after 2 hrs and the HR lady says to hurry up
so my Dr rx's the "no hand use" to fix the HR lady

moral of the story - Drs note has to be very clear on what can or can't be done.