Steps to Enable Fall Detection on Apple watch series 8
Go to the Settings app on your Apple Watch Series 8
Select the Fall Detection option in the SOS section
Simply choose Fall Detection by clicking the switch after you’ve located the option
Selecting “Always on” will enable Fall Detection at all times, while selecting “Only during workouts” will only turn it on when you start an activity.
If the aforementioned procedures do not work, open the Apple Watch app on your iPhone and scroll to the Emergency SOS section to turn on the Fall Detection function.