""" If the battery runs out or device is off

For supported devices, which include Pixel 8, Pixel 9, and Pixel 10 series, the Find Hub network can locate your phone for several hours even if the battery runs out or the device is powered off. """

https://support.google.com/android/answer/3265955?hl=en#zipp...

Couldn't find any official documentation from Apple, but there's this:

https://www.howtogeek.com/805624/what-does-iphone-findable-a...