You can change your previously selected workout place (home or gym) in the My program tab.
Go to the My program tab. Press 3 horizontal lines in the upper right corner, then select My program:
Tap Workout place, and choose Home or Gym. Then tap Update place:
Please note: You won’t see the option to change your workout place if you are using the HIIT or the Calisthenics workout type. For more details, please check this article.