Newer versions use a crowdsourced Bluetooth network, allowing you to find devices even when they are offline or powered down (on compatible hardware like Pixel 8 or 9).
From the Google Find My Device web portal , you can play a sound at full volume, display a message on the lock screen, or remotely perform a factory reset. User Perspectives
To ensure your device is protected, navigate to . You can choose between several participation levels, from "Off" to "With network in all areas" for the best chance of recovery.