It sounds like you are starting workout from phone app. Those 3 options on the phone app are fixed and cannot be changed. To get more options you have added to Exercise Shortcuts, use the Exercise App right on the Fitbit. From main clock screen, scroll right (swipe left) to 'Exercise' and tap that; then scroll left or right to get to the choice you want.
See How do I track my workouts with my Fitbit device?
Before posting, re-read to see if it would make sense to someone else not looking at your Fitbit or phone.
Best Answer