Nobody here has actually answered you. The Find My network is well documented, starting with https://support.apple.com/en-ca/guide/security/sec6cbc80fd0/web ht

Nobody here has actually answered you. The Find My network is well documented, starting with https://support.apple.com/en-ca/guide/security/sec6cbc80fd0/web https://support.apple.com/en-ca/guide/security/sec6cbc80fd0/... But essentially each device says where they saw an unknown device via Bluetooth. This gets aggregated into just knowing a device is in the area, but nobody (including Apple) can know what it is other than the owner of the account. There’s no risk to privacy unless you consider the knowledge of the mere existence of some Bluetooth capable device as being a privacy issue.