If you purchased a PRECISION 3+ powermeter, it will come with Apple Find My already enabled. If you are not sure which powermeter you may have, here are the indicators that your powermeter has Apple Find My:
Firmware version: The Apple Find My feature is only available on firmware version 2.3.0
Find My etching: Every Apple Find My enabled powermeter will have the below physical etching on the side of the powermeter pod.