If you want to make changes to your health tasks, go to Health then Schedule. Tap the Health task you want to change and a pop-up will appear (see bottom right).
Finally, select if you want to 'Edit' or 'Delete' the task.
Cannot see the 'Edit' and 'Delete' buttons in the screenshot above? Check out this article here.
Note: some changes are not possible to do under Edit, so you'll have to Delete the task and add a new one.
If you're still having issues editing your schedule, please reach out to the team!