Can I find I phone max 13 when powered off?

If you enabled Find My Network, the crowd-sourced feature that uses Bluetooth and nearby iPhones to locate your phone, you may be able to find the phone for a short time after it is powered off. But in general, no, the phone must be on and have a cellular data or Wi-Fi connection.

No, the phone must be turned on and connected to the internet in order to send a location signal.