need help activating fall detect app

If the birthdate you enter when setting up your Apple Watch (or adding it to the Health app on iPhone) indicates that you’re 55 or older, fall detection is turned on automatically. If you’re between age 18 and 55, you can turn on fall detection manually by doing the following:

1. Open the Settings app  on your Apple Watch.
2. Go to SOS > Fall Detection, then turn on Fall Detection.
3. You can also open the Apple Watch app on your iPhone, tap My Watch, tap Emergency SOS, then turn on Fall Detection.
4. Note: If you turn off wrist detection, Apple Watch SE and Apple Watch Series 4 and later won’t automatically attempt to call emergency services even after it has detected a hard impact fall.
5. Choose “Always on” to have fall detection on at all times, or “Only on during workouts” to have fall detection on only when you’ve started a workout.
6. If you’re between age 18 and 55, and setting up a new Apple Watch with watchOS 8.1 or later, fall detection during workouts is turned on automatically. If you upgrade your existing Apple Watch from an earlier version of watchOS, you must turn on the feature to detect hard falls only during workouts.

Open Settings on your iPhone, then tap Health/Medical ID and check your details.

Then;

Open the Health app and tap the Summary tab.

Tap your profile picture in the top right-hand corner.

Tap Health Profile, then tap Edit.

Check your information, like height, weight and age.

Tap Done.

And in the Watch App tap on emergency sos and tap on fall detection to turn it off or on.

If you're over 65 then fall detection is turned on by default.

Set up your Medical ID and add emergency contacts

Open Settings on your iPhone, then tap Health > Medical ID.

Tap Edit.

Enter your date of birth and other health information.

To add an emergency contact, tap the add button under emergency contacts. Tap a contact, then add their relationship.

To remove an emergency contact, tap the remove button next to the contact, then tap Delete.

To make your Medical ID available from the Lock screen, turn on Show When Locked. In an emergency, this gives information to people who want to help. To share your Medical ID with emergency responders, turn on Share During Emergency Call. When you make a call or send a text to emergency services on your iPhone or Apple Watch, your Medical ID will automatically be shared with emergency services.

Tap Done.