Find My iPhone: Cancel "Lost mode Pending" Is there a way to cancel Lost Mode Pending status of my iPhone?
If you remove the device from your account while it's offline, any pending actions for the device are canceled.


Apple Support - If your iPhone, iPad, or iPod touch is lost or stolen - What if your device is off or offline?

Keep in mind the impact of removing the device from your account — you will no longer be able to use Find My iPhone and Activation Lock will be disabled.