Lost Iphone erased but not showing up on Find My

Is the device location not showing up, or is the device not in the list at all?

If it's not in the list at all, one or more of the notifications you got was a phishing attack that you fell for. You gave the thief the credentials for your iCloud account, allowing them to remove the activation lock. You will never see it again.

Oh, and change your password. NOW!

If you erase a device that's running iOS 15 or later, or iPadOS 15 or later, you can still use Find My to find the device. Otherwise, you won't be able to find your device after you erase it.

You might still be able to find your Mac or Apple Watch if it's near a previously-used Wi-Fi network.

Find IMEI & Serial No. of the Lost Device

1. If an iPhone, iPad, or iPod touch is lost or stolen - Apple ...
2. Find the serial number or IMEI on an iPhone, iPad, or iPod ...

You may use a web browser to get the Serial Number and the IMEI Number. You cannot track using the IMEI number. but you may need it so keep it handy

Log in to https://appleid.apple.com with your Apple ID credentials. All your devices will be listed there. Click on any to get the details.

Do's, If you had enabled "Find My" before it was lost

• Mark As Lost.
• Erase your device. If your missing device is covered by AppleCare+ with Theft and Loss, you shouldn't erase your device. Instead, file a claim for your lost or stolen device.
• 

Beware of Phishing!

Be careful and be smart to --> Recognize and avoid phishing messages, phoney support calls ...

Note: Apple will never send you any info on Lost/Found iPhones. It (Phishing) may appear as the image given below.

Switched Off? Still traceable

Even if the iPhone is switched off it is findable, see the pic below.

Device Offline?

I see my device in Find My, but it's offline

If you see "Offline," "No location available," or "Location Services Off," your device might be offline for one of these reasons:

Don't see your device?

• You might not have Find My turned on.
• If you're using the Find My app, you can't see your device's location if more than 7 days have passed since its last location was sent to Apple.
• If you're using iCloud.com/find, you can't see your device's location if it's powered off, the battery has run out, or more than 24 hours has passed since its last location was sent to Apple.
• Learn how you can still protect your information.

Don'ts

If the device is removed from an account after it is erased, Activation Lock will be turned off. This allows another person to turn on and use the device.

An example of my iPhone 5 is given in the GIF below. There is no "Undo" after you remove it from your account.

Even though I set the phone to erase, will I still be able to track the location?

Yes, assuming that the phone has not been powered off, the battery has not run down and the phone has not lost its Internet connection.

Of course, you won't know what the actual issue might be if the phone does not appear in Find My.

The pic below is self-explanatory. If it is erased it will show as erased. Probably it is not connected to the internet yet.