don't see notify when left behind

You can set up separation alerts for your iPhone, iPad, or iPod touch with iOS 15, iPadOS 15, or later; Mac with Apple silicon and macOS 12 or later; or AirPods with the Find My network turned on.

You can only set up a separation alert from the device sharing your location. You receive an alert every time the device sharing your location separates from the device you set an alert for.

1. In the Find My app on iPhone tap Devices at the bottom of the screen, then tap the name of the device you want to set up an alert for.
2. Below Notifications, tap Notify When Left Behind.
3. Turn on Notify When Left Behind, then follow the onscreen instructions.
4. If you want to add a Trusted Location, you can choose a suggested location, or tap New Location, select a location on the map, then tap Done.
5. Tap Done.

M1 Mac mini, macOS 13.3.1;  Watch, series 7 GPS/cellular, watchOS 9.4; iPad Pro 2nd Gen, iPadOS 16.4.1; iPhone 12 Pro, iOS 16.4.1; TV 4th Gen, tvOS 16.4.1; HomePods, audioOS 16.4.1 and Airport Express w/ Airplay 2

I am not seeing the option "notify when left behind" in find my I have only notify when found. I have iphone 13pro and apple watch 9 with newest update