How to set my Apple watch to notify when left behind my iphone?

What a great question. According to Apple Support, this is the way to set it up:

Set up Notify When Left Behind

1. On your iPhone, open the Find My app.
2. Tap Devices or Items.
3. Tap a device.
4. Under Notifications, tap Notify When Left Behind. If you don't see Notify When Left Behind, then that device might not be supported.
5. Turn Notify When Left Behind on or off.

Set up and use Notify When Left Behind in the Find My app - Apple Support

You're doing better than me!

These "Find My" questions are the ones that I tend to read then leave without trying to help.

This is my Series 8 (GPS + Cellular).

I honestly don't know if it's going to work or not. I figure that I'll just buy another one if I somehow lose this one.

Edit: I was not doing apples for apples screenshot. Oops

Here is my theory, right or wrong. I believe when Notify When Left Behind is activated, the notice is sent when the non cellular watch is disconnected from the iPhone. I also activated this setting for my AirPods which are definitely not cellular (no option for that!). And I get a notice if I leave them them behind.

Carol,

The "Find My" is just confusing to me and so that's why I just try to read and learn.

So, the screenshot that LD150 and I provided are equal to each other while the screenshot that the author provided is clearly not the same.

galina125,

If you go into the Settings of your paired iPhone... Settings, > Privacy & Security, > Location Services and then scroll down a little ways, do your settings look like this:

Question was leave phone behind and get notified on the Watch

You wouldn't get a notification on airpods either if you left the phone behind.

Like Pilerman I put this on notify to see who would answer!

I wonder if OP Galina125 may have more than one iphone??

I shall drop the Apple Watch Penicillin cure then stand back and see ehat happens...

General bad behaviour 

If all settings normal but behaviour is irrational there is a progressive hierarchy of  remedies...

First force restart the Watch 

i.e. press and hold both the side button and Digital Crown for at least 10 seconds, then release both buttons when you see the Apple logo. 

 Then, although it may seem irrelevant, while it is restarting Force Restart the paired iphone   Force restart iPhone – Apple Support (UK) 

If it is still misbehaving... Unpair and set up again

 Unpair and erase your Apple Watch – Apple Support (UK) 

and then 

Set up your Apple Watch – Apple Support (UK)

You may also want to make sure the software on the watch and iphone  are both up to date to the same level. 

Always update iphone first

Update your iPhone or iPad - Apple Support

Update your Apple Watch - Apple Support 

If you've completed that troubleshooting and the issue is still not resolved, Contact Support. 

 Click here > Contact - Official Apple Support

or phone numbers  

Click here > Contact Apple for support and service - Apple Support

and or Genius Bar Reservation and Apple Support Options - Apple

If you want the Watch to find the phone it will need cellular.

Having said that, following Carol B's advice mine shows this and I don't have cellular

galina125,

Were the settings already set to "While Using the App" or did you need to change them?

LD150,

"...drop the penicillin cure..." 😂

But you're right!